New ultrasound technique is first to image inside live cells

These are stem cells becoming fat cells. Using the ultrasound technique, we can start exploring why fat cells put on fat and whether we can make the cells 'diet'.

Researchers at The University of Nottingham have developed a break-through technique that uses sound rather than light to see inside live cells, with potential application in stem-cell transplants and cancer diagnosis.

The new nanoscale ultrasound technique uses shorter-than-optical wavelengths of sound and could even rival the optical super-resolution techniques which won the 2014 Nobel Prize for Chemistry.

This new kind of sub-optical phonon (sound) imaging provides invaluable information about the structure, mechanical properties and behaviour of individual living cells at a scale not achieved before.

Researchers from the Optics and Photonics group in the Faculty of Engineering, University of Nottingham, are behind the discovery, which is published in the paper 'High resolution 3D imaging of living cells with sub-optical wavelength phonons' in the journal, Scientific Reports.

"People are most familiar with ultrasound as a way of looking inside the body -- in the simplest terms we've engineered it to the point where it can look inside an individual cell. Nottingham is currently the only place in the world with this capability," said Professor Matt Clark, who contributed to the study.

In conventional optical microscopy, which uses light (photons), the size of the smallest object you can see (or the resolution) is limited by the wavelength.

For biological specimens, the wavelength cannot go smaller than that of blue light because the energy carried on photons of light in the ultraviolet (and shorter wavelengths) is so high it can destroy the bonds that hold biological molecules together damaging the cells.

Optical super-resolution imaging also has distinct limitations in biological studies. This is because the fluorescent dyes it uses are often toxic and it requires huge amounts of light and time to observe and reconstruct an image which is damaging to cells.

Unlike light, sound does not have a high-energy payload. This has enabled the Nottingham researchers to use smaller wavelengths and see smaller things and get to higher resolutions without damaging the cell biology.

Read more at Science Daily

133 new species described by the California Academy of Sciences in 2016

An eye-popping, pink-and-yellow species of groppo is the deepest new fish discovery ever made by human hands. Grammatonotus brianne was discovered in the Philippines at a depth of 487 feet beneath the ocean's surface. The new groppo is one of 133 new species described by the California Academy of Sciences in 2016.

In 2016, researchers at the California Academy of Sciences added 133 new plant and animal species to our family tree, enriching our understanding of Earth's complex web of life and strengthening our ability to make informed conservation decisions. The new species include one bee fly, 43 ants, 36 beetles, one sand wasp, four spiders, six plants, 23 fishes, one eel, one shark, seven nudibranchs, five fossil urchins (and one fossil sand dollar), one coral, one skate, one African lizard, and an alarming new bird virus. More than a dozen Academy scientists -- along with several dozen international collaborators -- described the discoveries.

Proving that our planet contains unexplored places with never-before-recorded plants and animals (with their own set of evolving viruses), the scientists made their finds over five continents and three oceans, ventured into vast deserts, plunged beneath the sea, and scoured thick rainforests and towering mountain ranges. Their results help advance the Academy's mission to explore, explain, and sustain life on Earth.

"Biodiversity scientists estimate that we have discovered less than 10% of the species on our planet," says Dr. Shannon Bennett, Academy Chief of Science. "Academy scientists tirelessly explore the lesser-known regions of Earth -- not only to discover new species, but also to uncover the importance of these species to the health of our natural systems. Each of these species, known and as-yet-unknown, is a wonder unto itself but may also hold the key to ground-breaking innovations in science, technology, or society. Species live together in rich networks that thrive on complexity whether we can see it or not. Even the tiniest organism," she adds, "can be beautiful and important."

Below are a few highlights among the 133 species described by the Academy in 2016.

Flashy "twilight zone" groppo -- deepest fish discovered by human hands

One pink-and-yellow fish has earned its spot in deep reef history. Grammatonotus brianne -- an eye-popping species of groppo -- is the deepest new fish discovery ever made by human hands. The discovery was captured on film at 487 feet beneath the ocean's surface.

Academy scientists are currently diving to twilight zone reefs around the world. In these narrow bands of deep reefs, animals live in partial darkness, well beyond recreational diving limits yet above the deep trenches patrolled by submarines and ROVs. Reaching extreme depths requires Academy divers and their collaborators to push the boundaries of both technology and the human body, using closed-circuit "rebreathers" that extend the amount of time they can spend underwater.

The new groppo is one of several new species discoveries made during an Academy expedition (along with research partners from Hawaii's Bishop Museum) to the Philippines in 2014 -- part of an ongoing, multi-year exploration of the Coral Triangle's biological treasures from the shallows to deep mesophotic "twilight zone" reefs 200 to 500 feet beneath the ocean surface.

Deep-diving Academy ichthyologist Dr. Luiz Rocha and Bishop Museum research associate Brian Greene spotted the neon groppo (later named G. brianne for Greene's wife) during a murky, cold dive in the Philippine Verde Island Passage, a region known as the "center of the center" of Earth's marine biodiversity.

"This groppo is the most beautiful fish I've ever seen," says Rocha, a co-leader of the Academy's monumental push to explore, explain, and sustain coral reefs around the world. "But beyond its looks, it's a reminder that we know very little about the mysterious half-lit reefs we call the twilight zone. We need to understand the life inside these largely-unexplored deeper reefs because they may help us understand how the oceans respond to great change."

G. brianne joins 24 new species of fishes -- from camouflaging gobies to lanternsharks of the Indian Ocean -- described by Academy scientists in 2016 alone.

43 new ants (and a crowd of blood-sucking "Draculas")

Dr. Brian Fisher, Academy curator of entomology and real-life "Ant Man," recently added a whopping 43 new species to the tree of life. Fisher is a fierce advocate for the importance of small animals that support all terrestrial communities, and has devoted his life to the study of ants and biodiversity. Since 1996, he has conducted fieldwork in Madagascar -- where only 10% of natural habitat remains -- to explore regional biodiversity and generate data to drive conservation priorities in the country.

"Our work in Madagascar focuses on determining which ants live where as we develop new field guides as tools for diagnosing and understanding conservation problems," Fisher says. "It's not just about generating data -- we are trying to create a culture of interest in the natural world, from the smallest ant to the tallest tree."

Several of this year's finds belong to a group called Stigmatomma -- "Dracula ants" that build tiny, few-chambered colonies (generally no larger than a dime) beneath the soil. In a bizarre but fascinating means of distributing nutrients throughout the colony, ants from this group are known to wound their colonies' babies before drinking their blood -- a substance called "hemolymph" in insects. An elongated jaw with two large pincers also allows the ants to grasp prey mostly comprised of centipedes, but also beetle larvae.

"Because these ants are so rarely collected, finding them is like uncovering buried treasure," says Flavia Esteves, a postdoctoral researcher at the Academy who has joined Fisher in the field since 2010. Most Stigmatomma species spend the entirety of their lives beneath the soil or inside rotten logs. Esteves cuts through Madagascar's clay-like soil with a machete, and then uses a pocket knife -- and finally, forceps -- to carefully expose the ants.

"In an island like Madagascar where human activities are destroying sensitive habitats, understanding specialized species such as Stigmatomma is even more important. We fear that the unique environmental niche they occupy will go unfilled once these ants are gone," says Esteves. "We still have so much to learn from these specialized soil dwellers," adds Fisher.

Fisher recently returned from a nine-month expedition to Mozambique, accompanied by Esteves, as part of a Fulbright Scholar Grant to study ants and climate. His work in Madagascar (including founding the country's first and only biodiversity research center) and Mozambique continue to provide conservation partners with a wealth of new biodiversity data and monitoring aids to inform future land-use planning.

A gray-haired "grandfather" bee fly

All around us, insects flit, hover, and buzz about, but one family -- the bee flies (Bombyliidae sp.) -- may cause passersby to look twice. The nearly 5,000 species that make up this fly group imitate a wide range of relatives, from delicate honey bees to menacing wasps and spiders. "Don't be deceived by stripes or fuzzy adornments," says fly-expert Dr. Michelle Trautwein, Academy curator of entomology: insects from this group are all flies. A new species from Madagascar was recently discovered as part of a collaborative project between the Academy and the Schlinger Foundation to document the country's diversity of insects and their close relatives.

Named Thevenetimyia spinosavus (which translates to "thorny grandfather"), this gray-haired bee fly was discovered by Natalia Maass, who worked with Trautwein for two summers as an undergraduate intern. While examining specimens under the microscope, Maass noticed one quite unlike the rest.

"He was longer and more slender than other bee flies, with big spikes on his thorax and longer, gray bristly hairs," says Trautwein, describing why Natalia granted it its grandparent moniker. What's more, this stubbled bee fly was completely isolated from any other species within the same relative group. Similar species of bee fly are found in Northern Africa and North America -- both a long way from Madagascar -- meaning this "thorny grandfather" is part of a group with an incredibly wide distribution.

No matter where they're found, adult bee flies spend their time pollinating nearby plants. But as larvae, they prey viciously upon the larvae of other species. Adult bee flies will deposit their larvae in an aerial raid: dropping them from above to land in strategic locations where they can hatch, invade a nearby nest, and consume larvae of other insect colonies before growing up to be gentler, flower-visiting -- rather than larvae-poaching -- adults.

"An important piece of this project was being able to support a young woman in science so devoted to learning the language of species anatomy and descriptions," says Trautwein. "Watching Natalia grow and become a graduate student gives me great confidence in the young scientists who will continue to contribute to natural history collections -- our best snapshots of biodiversity in the face of great change."

New bird virus linked to beak-bending disorder

This year, scientists uncovered a fascinating new clue in the global mystery surrounding wild birds with grossly deformed beaks. Dr. Jack Dumbacher, Academy curator of ornithology and mammalogy -- alongside a team of researchers from UCSF and USGS -- identified a new virus that has been linked to Avian Keratin Disorder (AKD), a disease responsible for debilitating beak overgrowth and whose cause has remained elusive despite more than a decade of research.

This new virus -- identified from Alaska and the Pacific Northwest -- is being investigated as a potential cause of AKD and represents a critical step in understanding the emergence of this disease in wild bird populations around the world.

"Take one look at a bird suffering from Avian Keratin Disorder, and you'll understand the importance of stopping its spread," says Dumbacher. "Birds must be able to feed themselves and preen their plumage by carefully spreading waterproofing oils on their feathers. When deformed beaks restrict them from these life-giving activities, birds become cold, hungry, and often die. We're trying to understand the causes, origins, and distribution of this disorder."

After sifting through hundreds of thousands of DNA fragments (and comparing them to known virus groups among birds), scientists identified a new virus suspect belonging to the picornavirus family -- a large and diverse group that includes well-known human offenders like polio, hepatitis A, and the common cold. The team named their discovery Poecivirus after the genus of black-capped chickadee (Poecile atricapillus) from which the sequences originated, and in which AKD was first documented.

Though more research is necessary to establish Poecivirus definitively as the main cause of AKD, it remains the strongest lead yet. As part of the new virus description, the team generated a detailed map of Poecivirus' genetic material -- a tool that will enable scientists all over the world to aid in its identification among birds exhibiting clinical signs of AKD.

A fleet of beetles from Africa and China

After more than a dozen combined expeditions to the damp rainforests of Madagascar and cloud-kissed mountains of southwestern China, Dr. Dave Kavanaugh -- Academy emeritus curator of entomology -- is sharing 36 exciting new discoveries. Ground beetles are a wildly diverse group of winged and wingless predators that feast on other insects, and some are known to survive in extreme environments around the world.

Twenty-six of Kavanaugh's recent species discoveries hail from Madagascar's Ranomafana National Park -- an area of lush tropical rainforest stretching nearly 160 square miles across the southwestern portion of the island. During one 5-week expedition, Kavanaugh's daughter Kathryn (for whom he later named a beetle Chlaenius kathrynae) assisted him in the field by searching for species of ground beetles in the leaf litter.

"The first few days of one Madagascar expedition were dry as a bone, making the rainforest insects very hard to find," says Kavanaugh. "And then the rains came. It poured day and night for the next month. We worked through the storms with jungle rot on our feet from the constant damp." The rain led to the successful collection of many new beetle species, including flat-backed, fungi- and log-dwelling Eurydera oracle, named in honor of generous expedition support provided by Oracle.

Several additional new species (including three new genera) are described from the Gaoligong Mountains of China's Yunnan Province, a region where extreme physical geography has caused a jaw-dropping array of species to evolve over millennia. Since 1998, Kavanaugh and his colleagues have trekked mountains packed with endemic species -- those found nowhere else in the world. Scientists view the region as an isolated paleoenvironment, or an area that (due to its location) has remained relatively unchanged for millions of years. In less than two decades, the team has grown the list of the area's known ground beetles from 50 to 550 species.

Kavanaugh collaborates with local Chinese colleagues on the China Natural History Project to document the vast array of ground beetles and other animals and plants still being discovered in this isolated region. "Due to the restricted range and specialization of these insects, they are often some of the first to indicate significant changes to regional climate and biodiversity," says Kavanaugh, "which is why it's so important that we learn all about the life around us. You never know what clues even the smallest insects underfoot may hold to the rhythms of life on this planet."

Armored lizards of Angola

Amid outcroppings of granite in the arid, sloping lowlands of southern Angola, a newly discovered species of lizard wedges itself into particularly tight crevices, head-first. Only threatening spines are left exposed along its body and tail to deter approaching predators. Despite this clever maneuver, there was no escaping discovery by Dr. Edward Stanley, Academy herpetology research associate, who suspected this particular lizard might differ from known species in the area.

Stanley formally described this new species of armored lizard with the aid of CT scans, a type of imaging technology that combines a series of x-rays to reveal information about the lizard's uniquely armored body. Scans revealed that the tiny, bony spikes of Cordylus namakuiyus are actually embedded in the lizard's skin rather than attached to the skeleton itself.

"CT technology allowed us to visualize and measure the armoring structure in this new lizard species," says Stanley. "This is also the first time a 3D digital representation of a newly described species is freely available to download as part of a species description."

The species discovery -- the result of a joint expedition between the Academy and partner institutions in Angola -- represents a strong collaborative step towards exploring the region's extreme natural landscape. "Not much is known about Angolan species of armored lizards," says Stanley, "particularly in remote or inaccessible parts of the country, so we are excited to be exploring this biologically rich area."

Local coral discovery helps double California sanctuary

Just north of San Francisco off California's coastline, countless species thrive in the deep, chilly waters that make up the Greater Farallones National Marine Sanctuary -- one of the most biologically productive regions on the planet. Here, scientists use remotely operated vehicles, or ROVs, to explore life beneath the surface. On a 2012 expedition with NOAA, octocoral expert and Academy curator of invertebrate zoology Gary Williams set off aboard the R/V Fulmar to investigate vibrant offshore life down to 1,400 feet deep.

Among the sea stars, sea worms, snails, sponges, and crabs, Williams saw a single, whip-like stalk -- only 15 inches in length -- of a snow-white coral gently swaying in the ocean currents. Unlike the hard coral relatives that compose the famous tropical reefs closer to the ocean's surface, this soft-bodied coral species stands alone at depth and feeds on microscopic plankton floating through the water column.

Even before its formal description, the new species -- now named Swiftia farallonesica after its sanctuary home -- served as a brilliant symbol of the region's ecological importance, and helped strengthen the case for sanctuary expansion. In March 2015, NOAA ensured these sanctuaries would be protected for years to come by more than doubling their size and adding strict industry regulations on commercial fishing as well as a ban on all drilling, mining, and ship discharges. The expansion added 2,700 square miles of protected territory, reaching up to Point Arena in Mendocino County.

"Discovery is always an exciting thing," says Williams. "It's crucial to continue exploring the unknown so we can properly manage and protect these priceless marine ecosystems in our own backyard."

Read more at Science Daily

A fertilizer dearth foiled animal evolution for eons?

These 1.9 billion-year-old marine sediments are from the East Arm of the Great Slave Lake, Canada. Thousands of samples for this study were collected from the few places on Earth that have such remaining slivers of ancient seafloor.

For three billion years or more, the evolution of the first animal life on Earth was ready to happen, practically waiting in the wings. But the breathable oxygen it required wasn't there, and a lack of simple nutrients may have been to blame.

Then came a fierce planetary metamorphosis. Roughly 800 million years ago, in the late Proterozoic Eon, phosphorus, a chemical element essential to all life, began to accumulate in shallow ocean zones near coastlines widely considered to be the birthplace of animals and other complex organisms, according to a new study by geoscientists from the Georgia Institute of Technology and Yale University.

Along with phosphorus accumulation came a global chemical chain reaction, which included other nutrients, that powered organisms to pump oxygen into the atmosphere and oceans. Shortly after that transition, waves of climate extremes swept the globe, freezing it over twice for tens of millions of years each time, a highly regarded theory holds. The elevated availability of nutrients and bolstered oxygen also likely fueled evolution's greatest lunge forward.

After billions of years, during which life consisted almost entirely of single-celled organisms, animals evolved. At first, they were extremely simple, resembling today's sponges or jellyfish, but Earth was on its way from being, for eons, a planet less than hospitable to complex life to becoming one bursting with it.

Earth's true genesis

In the last few hundred million years, biodiversity has blossomed, leading to dense jungles and grasslands echoing with animal calls, and waters writhing with every shape of fin and color of scale. And most every stage of development has left its mark on the fossil record.

The researchers are careful not to imply that phosphorus necessarily caused the chain reaction, but in sedimentary rock taken from coastal areas, the nutrient has marked the spot where that burst of life and climate change took off. "The timing is definitely conspicuous," said Chris Reinhard, an assistant professor in Georgia Tech's School of Earth and Atmospheric Sciences.

Reinhard and Noah Planavsky, a geochemist from Yale University, who headed up the research together, have mined records of sedimentary rock that formed in ancient coastal zones, going down layer by layer to 3.5 billion years ago, to compute how the cycle of the essential fertilizer phosphorus evolved and how it appeared to play a big part in a veritable genesis.

They noticed a remarkable congruency as they moved upward through the layers of shale into the time period where animal life began, in the late Proterozoic Eon.

"The most basic change was from very limited phosphorus availability to much higher phosphorus availability in surface waters of the ocean," Reinhard said. "And the transition seemed to occur right around the time that there were very large changes in ocean-atmosphere oxygen levels and just before the emergence of animals."

Phosphorus at the beach

Reinhard and Planavsky, together with an international team, have proposed that a scavenging of nutrients in an anoxic (nearly O2-free) world stunted photosynthetic organisms that otherwise had been poised for at least two billion years to make stockpiles of oxygen. Then that balanced system was upset and oceanic phosphorus made its way to coastal waters.

The scientists published their findings in the journal Nature. Their research was funded by the National Science Foundation, the NASA Astrobiology Institute, the Sloan Foundation and the Japan Society for the Promotion of Science.

The work provides a new view into what factors allowed life to reshape Earth's atmosphere. It helps lay a foundation that scientists can apply to make predictions about what would allow life to alter exoplanets' atmospheres, and may inspire deeper studies, here on Earth, of how oceanic-atmospheric chemistry drives climate instability and influences the rise and fall of life through the ages.

Cyanobacteria, the mother of O2

Complex living things, including animals, usually have an immense metabolism and require ample O2 to drive it. The evolution of animals is unthinkable without it.

The path to understanding how a nutrient dearth would starve out breathable oxygen production leads back to a very special kind of bacteria called cyanobacteria, the mother of oxygen on Earth.

"The only reason we have a well-oxygenated planet we can live on is because of oxygenic photosynthesis," Planavsky said. "O2 is the waste product of photosynthesizing cells, like cyanobacteria, combining CO2 and water to build sugars."

And photosynthesis is an evolutionary singularity, meaning it only evolved once in Earth's history -- in cyanobacteria.

Some other biological phenomena evolved repeatedly in dozens or hundreds of unrelated incidents across the ages, such as the transition from single-celled organisms to rudimentary multicellular organisms. But scientists are confident that oxygenic photosynthesis evolved only this one time in Earth's history, only in cyanobacteria, and all plants and other beings on Earth that photosynthesize coopted the development.

The iron anchor

Cyanobacteria are credited with filling Earth's atmosphere with O2, and they've been around for 2.5 billion years or more.

That begs the question: What took so long? Basic nutrients that fed the bacteria weren't readily available, the scientist hypothesize. The phosphorus, which Planavsky and Reinhard specifically tracked, was in the ocean for billions of years, too, but it was tied up in the wrong places.

For eons, the mineral iron, which once saturated oceans, likely bonded with phosphorus, and sank it down to dark ocean depths, far away from those shallows -- also called continental margins -- where cyanobacteria would have needed it to thrive and make oxygen. Even today, iron is used to treat waters polluted with fertilizer to remove phosphorus by sinking it as deep sediment.

The researchers also used a geochemical model to show how a global system with high iron concentration and low phosphorus availability combined with low nitrogen availability in ocean shallows could perpetuate itself in a low-oxygen world.

"It looks to have been such a stable planetary system," Reinhard said. "But it's obviously not the planet we live on now, so the question is, how did we transition from this low-oxygen state to where we are now?"

What ultimately caused that change is a question for future research.

Phosphorus starting pistol

But something did change about 800 million years ago, and cyanobacteria and other minute organisms in continental margin ecosystems got more phosphorus, the backbone of DNA and RNA, and a main actor in cell metabolism. The bacteria became more active, reproduced more quickly, ate lots more phosphorus and made loads more O2.

"Phosphorus is not only essential for life," Planavsky said. "What's implicit in all this is: It can control the amount of life on our planet."

When the newly multiplied bacteria died, they fell to the floor of those ocean shallows, stacking up layer by layer to decay and enrich the mud with phosphorus. The mud eventually compressed to stone.

"As the biomass increased in phosphorus content, the more of it landed in layers of sedimentary rock," Reinhard said. "To scientists, that shale is the pages of the sea floor's history book."

Scientists have thumbed through them for decades, compiling data. Planavsky and Reinhard analyzed some 15,000 rock records for their study.

Read more at Science Daily

Sex evolved to help future generations fight infection, scientists show

The scientists examined 6,000 Daphnia, waterflea, as part of the study.

Why does sex exist when organisms that clone themselves use less time and energy, and do not need a mate to produce offspring? Researchers at the University of Stirling aiming to answer this age-old question have discovered that sex can help the next generation resist infection.

Populations that clone themselves are entirely female and do not need sex to reproduce. As sex requires males, and males do not produce offspring themselves, an entirely clonal population should always reproduce faster than a sexual one.

Yet while some animal and plant species can reproduce without sex, such as komodo dragons, starfish and bananas, sex is still the dominant mode of reproduction in the natural world.

Scientists know that sex allows genes to mix, allowing populations to quickly evolve and adapt to changing environments, including rapidly evolving parasites.

However, for sex to beat cloning as a reproduction strategy, there must be large-scale benefits that make a difference to the next generation. The theory has been difficulty to test as most organisms are either wholly sexual or clonal so cannot be compared easily.

A team of experts from the University of Stirling have taken an innovative approach to test the costs and benefits of sex. Using an organism that can reproduce both ways, the waterflea, researchers found sexually produced offspring were more than twice as resistant to infectious disease as their clonal sisters.

Dr Stuart Auld of the Faculty of Natural Sciences, said: "One of the oldest questions in evolutionary biology is, why does sex exist when it uses up so much time and energy?

"Sex explains the presence of the peacock's tail, the stag's antlers and the male bird of paradise's elaborate dance. But if a female of any of these species produced offspring on her own, without sex, her offspring should come to dominate, while the other females watch the redundant males fighting and dancing. So, why are we not surrounded by clonal organisms?

"By comparing clonal and sexual daughters from the same mothers, we found sexually produced offspring get less sick than offspring that were produced clonally. The ever-present need to evade disease can explain why sex persists in the natural world in spite of the costs."

Read more at Science Daily

Bizarre Antimatter Looks Surprisingly Like Regular Matter

For the first time, physicists have shown that atoms of antimatter appear to give off the same kind of light that atoms of regular matter do when illuminated with lasers, a new study finds.

More precise measurements of this emitted light could unearth clues that might finally help solve the mystery of why there is so much less antimatter than normal matter in the universe, researchers say.

For every particle of normal matter, there is an antimatter counterpart with the same mass but the opposite electrical charge. The antiparticles of the electron and proton, for instance, are the positron and antiproton, respectively.

When a particle meets its antiparticle, they annihilate each other, giving off a burst of energy. A gram of antimatter annihilating a gram of matter would release about twice the energy as the nuclear bomb dropped on Hiroshima, Japan. (You don't have to worry about antimatter bombs popping up anytime soon; researchers are very far from creating anywhere near a gram of antimatter.)

It remains a mystery why there is so much more matter than antimatter in the universe. The Standard Model of particle physics — the best description yet of how the basic building blocks of the universe behave — suggests that the Big Bang should have created equal amounts of matter and antimatter.

Scientists would like to learn more about antimatter to see if it behaves differently from matter in a way that could help solve the puzzle of why the universe has so little antimatter.

One key set of experiments would involve shining lasers on antimatter atoms, which can absorb and emit light much like atoms of regular matter. If antihydrogen atoms emitted a different spectrum of light than hydrogen atoms, such spectral differences could yield insights on other ways matter and antimatter differ, the researchers said.

Now, for the first time, scientists have used lasers to carry out a spectral analysis of antihydrogen atoms.

"I like to call this the Holy Grail of antimatter physics,"said study co-author Jeffrey Hangst, a physicist at Aarhus University in Denmark. "I've been working for more than 20 years to make this possible, and this project has finally come together after many difficult steps."

The researchers experimented with antihydrogen, which is the simplest atom of antimatter, just as hydrogen is the simplest atom of regular matter. Antihydrogen atoms each consist of one antiproton and one positron.

Creating enough antimatter for researchers to examine has proven highly challenging. To create antihydrogen atoms, the researchers mixed clouds of about 90,000 antiprotons with clouds of about 1.6 million positrons (or antielectrons), yielding about 25,000 antihydrogen atoms per attempt using the ALPHA-2 apparatus, which is an antimatter generation and trapping system, at the European Organization for Nuclear Research (CERN) in Switzerland.

After the researchers create the antihydrogen atoms, "you have to hold on to them, and that's very difficult," Hangst told Live Science. Antihydrogen is electrically neutral, which means that it cannot be held in place using electric fields, "and you have to keep it away from matter, so it has to be kept in high vacuum," he said. In addition, antimatter is best kept at temperatures close to absolute zero (minus 459.67 degrees Fahrenheit, or minus 273.15 degrees Celsius), so it is slow-moving and easier to hold on to than antihydrogen atoms.

The researchers trapped antihydrogen in very strong magnetic fields. "We can now hold about 15 antihydrogen atoms at a time," Hangst said.

Then, they shone a laser on the antihydrogen, which caused the atoms to give off light. The scientists then measured the spectrum of light that antihydrogen gave off with a precision of about a few parts in 10^10 — that is, a 1 with 10 zeroes behind it. In comparison, researchers can currently measure these properties of hydrogen to a precision of a few parts in 10^15. "We want to measure antihydrogen with the same precision as hydrogen, and we see no reason why we can't do that in the future," Hangst said.

Read more at Discovery News

Famous Star Betelgeuse May Have Had a Little Sister, Which It Ate

When you next wish upon a star, spare a thought for that bright dot in the constellation of Orion — it could be where an unfortunate stellar sibling got gobbled up.

As the second-brightest star on the shoulder of Orion (The Hunter), Betelgeuse is a mangled stellar mess. Coming to the end of its life, the massive red supergiant is convulsing as its superheated upper layers become stripped away by violent stellar winds. These winds are creating vast clouds of gas, a prelude to the mayhem just around the corner.

Having lived its comparatively short life of around 8 million years (to put that in perspective, our middle-aged sun has been around for 5 billion years), rapidly burning away its supply of hydrogen fuel, this massive bloated star only 700 light-years from Earth is now in the process of fusing heavier elements together. Within the next million years (some estimately put it within the next 100,000 years), Betelgeuse will become so unstable that it will explode as a supernova, a fact that has spawned all kinds of silly doomsday theories for life on Earth.

Though Betelgeuse is so close and it is one of the most studied stars in the sky, it still holds many mysteries. And in new research published by the journal Monthly Notices of the Royal Astronomical Society, J. Craig Wheeler of The University of Texas at Austin and his team of international undergraduate students have uncovered something peculiar about the star's spin.

When a star reaches the end of its life and expands like Betelgeuse has, physics dictates that its rate of spin should slow down. A good analogy for this effect is if an ice skater spins on the spot and extends her or his arms outward, their rate of spin slows. The same physics applies to an expanding star. But that's not the case here, Betelgeuse is spinning way too fast!

"We cannot account for the rotation of Betelgeuse," said Wheeler in a statement. "It's spinning 150 times faster than any plausible single star just rotating and doing its thing."

Wheeler's team took on this puzzle and ran a series of computer simulations in an attempt to explain what's going on and one scenario emerged.

"Suppose Betelgeuse had a companion when it was first born?" he pondered. "And let's just suppose it is orbiting around Betelgeuse at an orbit about the size that Betelgeuse is now. And then Betelgeuse turns into a red supergiant and absorbs it — swallows it."

To explain the current spin of Betelgeuse, the massive star would have had to swallow a star of a similar size to our sun. Also, as the majority of stars come in in pairs (or more), it's certainly within the realms of possibility that it evolved with a smaller stellar sibling in tow.

Read more at Discovery News

Mysterious 'Ghost Shark’ Captured on Video for the First Time

An elusive "ghost shark" has come out of hiding, as video has captured footage of the fish — whose face looks as if it were stitched together in a Frankenstein-like manner — for the first time in the Northern Hemisphere.

"It's a bizarre-looking fish with a pointed snout," said Lonny Lundsten, a senior research technician at Monterey Bay Aquarium Research Institute (MBARI) in California. "It has a long, pointed, tapering tail, relatively large eyes, [and] it's almost entirely grayish-blue."

The rare, deep-sea fish — called a "ghost shark" for its appearance, but also known as the pointy-nosed blue ratfish — made its video debut after researchers recorded the animal via remotely operated underwater vehicles (ROVs) off the coasts of Hawaii and California. The videos, six in all, provide the first evidence that this species of ratfish lives in the Northern Hemisphere, Lundsten told Live Science.

The videos were taken between 2000 and 2007, but it was only in October that researchers published the findings in the journal Marine Biodiversity Records, said Lundsten, who co-authored the study with two of his colleagues.

The Monterey Bay Aquarium Research Institute's ROV (remotely operated underwater vehicle) caught footage of six different ghost-shark individuals. Notice that the fish are swimming over rocky, rather than soft sediment.

The first three videos, taken in 2000, were recorded before scientists had even identified the fish. It wasn't until 2002 that another group of scientists introduced the species to the scientific world, publishing in the journal Cybium. They named the fish Hydrolagus trolli in honor of Ray Troll, an Alaskan science illustrator who often draws marine animal discoveries.

Despite naming the newfound species, researcher Dominique Didier, a professor of biology at Millersville University in Pennsylvania, had never seen a live specimen. Instead, she and her colleague studied 23 dead H. trolli specimens caught as bycatch by trawlers (deep-sea fishing boats that catch marine animals with large nets) in the southwestern Pacific Ocean. These fish were all found in the Southern Hemisphere off the coasts of Australia, New Zealand, New Caledonia, and the Lord Howe Rise (a deep-sea plateau) and Norfolk Ridge formations, Lundsten said.

But Didier did get a chance to see the MBARI videos and confirmed that the fish in the footage with wing-like fins were likely H. trolli, Lundsten said.

Little is known about H. trolli, because it lives so deep underwater — between 1 mile and 1.3 miles (1,640 to 2,063 meters) under the surface, Lundsten said. Luckily, the videos have helped the researchers gather more clues about these ghost sharks, which measure between 2 feet and 3 feet (0.6 to 0.9 m) long.For instance, the videos show H. trolli swimming over a rocky seafloor, rather than soft sediment, "which is unusual for ratfishes," Lundsten said. "[Ratfishes] are typically found above soft sediment, and the fact that these live in a rocky habitat is unique to this group."

Lundsten added that H. trolli's Frankenstein-like stitches are actually sensory organs that cover the fish's entire body, especially its face. These organs can sense minute movements and vibrations in the surrounding water, which helps the fish hunt prey, said Dave Ebert, who co-authored the study with Lundsten and Amber Reichert, a graduate student of marine science at California State University (Cal State). Ebert is also the program director of the Pacific Shark Research Center at Cal State's Moss Landing Marine Laboratories.

In addition, male ratfish "have a strange sexual-related organ that's on the top of their head," Lundsten said. "It's a club-shaped thing that has spines on it, and it's used for grasping and better positioning the female during copulation."

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'Casper' Octopus Could Be Threatened by Deep-Sea Mining

A cute purple octopus that charmed the internet last spring may be at risk, thanks to its penchant for raising its young on a type of seafloor environment that has the eye of mining interests.

So suggests a new report published in the journal Cell Biology led by researchers from Germany's Alfred Wegener Institute.

The cute octopod in question is a tiny cephalopod found earlier this year in the Hawaiian archipelago, one that is likely an undescribed, new species.

In the new study, scientists have found that the creature tends to populate areas of manganese crust that are rich in the kinds of metals used in the manufacture of consumer electronics. The animals deposit their eggs among dead sponges in such areas. And, as they live at depths that can exceed 13,000 feet (4,000 meters), the water is so cold that eggs likely take years to hatch.

With such desirable metals located right where it likes to breed, then, the octopus could be in trouble.

"The brooding [location] is important as these sponges only grow in some areas on small, hard nodules or rocky crusts of interest to mining companies because of the metal they contain," said study lead Autun Purser, of the Alfred Wegener Institute, in a statement. "The removal of these nodules may therefore put the life cycle of these octopods at risk."

Mining the seafloor for all of its riches could make it impossible for the octopus to bounce back.

"This would be a great loss to biodiversity in the deep sea and may also have important knock-on effects," said Purser. "Octopods are sizable creatures, which eat a lot of other smaller creatures, so if the octopods are removed, the other populations will change in difficult-to-predict ways."

For some time, the seafloor has been postulated as the next big mining thing, akin to a modern-day gold rush. According to The Pew Charitable Trusts, rules governing deep-sea mining are in the works but are not scheduled to come into force until the end of 2018. Until then, commercial deep-sea mining is not allowed, at least in bodies of water governed by The International Seabed Authority, the world's only body charged, by its member nations, with regulating the issue.

In the meantime, however, nearly two-dozen contracts have been issued for mining exploration operations in the Pacific, Indian and Atlantic oceans.

It's easy to understand why. The bottom of the sea, depending on where you are, can be rich in the kinds of nodules of metal Purser noted. The so-called polymetallic nodules can contain a whole host of metals, including nickel, aluminum, silicone, rare earth metals, and iron.

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There's a Jet Stream Churning in the Earth's Core

When you hear the term "jet stream," you probably think of the powerful winds that encircle the Earth, high up in the atmosphere.

But now, scientists have used observations by the European Space Agency's Swarm satellites to identify another sort of jet stream, one that's made of molten metal instead of air and is located 1,865 miles beneath the Earth's surface, stretching from Siberia to Alaska.

The findings, contained in an article just published in the online edition of Nature Geoscience, depict a previously unknown geological feature that may yield secrets about the Earth's inner workings.

The jet stream inside the Earth is located along the border of two regions of the Earth's core, and it's about 261 miles in width. It moves about 25 miles in the course of a year. That's far slower than the hundreds of miles per hour at which the atmospheric jet streams travel, but three times faster than other parts of the outer core and hundreds of thousands of times faster than the Earth's tectonic plates. The interior jet stream gradually is accelerating, according to the scientists' findings.

"What's most surprising about the jet is that it's likely been in the core for many years and no-one has seen it before — not even with previous satellite missions," lead researcher Phil Livermore, an associate professor in the School of Earth and the Environment at the University of Leeds, said in an email. "The jet is likely to have been around in the core for some hundreds of millions of years, and we've only just glimpsed it through the technical-revolution of the Swarm mission."

Swarm, launched in 2013, uses a trio of satellites rather than just one probe to produce extremely high-resolution images of the Earth's magnetic field and how it moves. By analyzing that data, scientists essentially can peer inside the planet.

"Swarm measures the magnetic field in space, from which it is possible to create an image of the magnetic field at the edge of the Earth's core," Livermore said. "Although the mantle is solid rock, the magnetic field can 'see' inside, and hence produce an x-ray view of the inside of our planet. At high latitude, at the edge of the core, there are patches of intense magnetic field that we can track over time. it is these features that allows us to infer that the iron in the core is moving in a jet. We cannot see the jet itself, but we can see its effect by the fact that it drags around magnetic features."

Livermore described the jet stream as "a very significant" feature of the core, and said that gaining knowledge about it will help scientists to better understand the interior workings of the planet.

"The jet stream probably doesn't have any immediate impacts for us on the Earth surface, but it may shed light on the dynamical state of the liquid core," he said. "The more we know about how the core operates, the more chance we will have in, for example, being able to predict whether the current weakening of the magnetic field is a precursor to a global reversal."

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Planet Remains Found Scattered Over 'Death Star'

A star with a suspicious cocktail of chemicals in its atmosphere has been found and astronomers believe that it's evidence of a planetary murder.

The star, called HIP68468, shares some similarities to our sun and is known to play host to a system of planets. A large gas giant-like planet, approximately 50 percent bigger than Neptune, has been spotted, along with a "super-Earth" world. The super-Earth orbits extremely close to its host star, completing one orbit every three days. But it would appear that there was at least one more planet that used to exist, but has since become stellar toast.

While studying HIP68468, which is located 300 light-years away, the international team of astronomers detected high quantities of lithium in its atmosphere, along with other elements that are associated with rocky planets. By considering the star's age of six billion years, any lithium it formed with would have been long gone, so a fresh batch of lithium must have fallen in recently. Taking into account the observed quantity of lithium and other minerals, the researchers were able to deduce that an entire planet, approximately six times the mass of Earth, likely got consumed by the star in its recent history.

"It's as if we saw a cat sitting next to a bird cage," said Debra Fischer, of Yale University, in a statement. "If there are yellow feathers sticking out of the cat's mouth, it's a good bet that the cat swallowed a canary."

"This study of HIP68468 is a post-mortem of this process happening around another star similar to our sun," she added. "The discovery deepens our understanding of the evolution of planetary systems."

Our solar system may seem to be a stable place, with the planets carving out unchanging orbits. But over the evolution of stars and planets, gravitational instabilities tweak planetary orbits, often causing huge migrations. Migrating planets can have a myriad of effects on other planets, asteroids and comets, and even the stars themselves. In the case of HIP68468, it's thought that an inner planet migrated too close to the superheated furnace and was ultimately consumed by the star.

And using research such as this, we can look at the solar system's planets, perhaps seeing the ultimate demise of planets we know and love. Though Earth can rest easy for now, Mercury, the solar system's innermost planet, might not be so lucky.

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