Biology articlesBering Sea ecosystem responding to changes in Arctic climate
Physical changes--including rising air and seawater temperatures and decreasing seasonal ice cover--appear to be the cause of a series of biological changes in the northern Bering Sea ecosystem that could have long-range and irreversible effects on the animals that live there and on the people who depend on them for their livelihoods.
Research show bats have complex skills
A little clutter on the way to the refrigerator might mean taking a few extra seconds to navigate your way to a late night snack. For a bat flying around in the dark searching for a meal of insects, the "clutter" of things like leaves and trees could mean missing out on a tasty morsel of dinner altogether.
Poison dart frog mimics gain when birds learn to stay away
When predators learn to avoid a highly toxic frog, they generalize, and this allows a harmless frog to mimic and be more abundant than a frog whose poison packs less punch, biologists at The University of Texas at Austin studying poison dart frogs in the Amazon have discovered.
Mice with glowing hearts
There is the heart of gold, and then there is the heart that glows. Literally. Cornell researchers have genetically engineered mice whose hearts glow with a green light every time they beat. The development gives researchers insights into how hearts develop in living mouse embryos and could improve our understanding of irregular heartbeats, known as arrhythmias, as well as open doors to observing cellular processes to better understand basic physiology and disease.
Liquid crystals show promise in controlling embryonic stem cells
Liquid crystals, the same phase-shifting materials used to display information on cell phones, monitors and other electronic equipment, can also be used to report in real time on the differentiation of embryonic stem cells.
New method for identifying microbes
Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have developed a new, high-throughput technique for identifying the many species of microorganisms living in an unknown "microbial community."
Old-World primates evolved color vision to better see each other blush
Your emotions can easily be read by others when you blush--at least by others familiar with your skin color. What's more, the blood rushing out of your face when you're terrified is just as telling. And when it comes to our evolutionary cousins the chimpanzees, they not only can see color changes in each other's faces, but in each other's rumps as well.
Beer byproduct gives researcher something sweet to chew on
Researchers at the University of Alberta are working on a new process to make sweetener from the grain products left over from the beer-brewing process.
Researchers simulate complete structure of virus-on computer
When Boeing and Airbus developed their latest aircraft, the companies' engineers designed and tested them on a computer long before the planes were built. Biologists are catching on. They've just completed the first computer simulation of an entire life form - a virus.
Rare chinese frogs communicate by means of ultrasonic sound
First came word that a rare frog (Amolops tormotus) in China sings like a bird, then that the species produces very high-pitched ultrasonic sounds. Now scientists say that these concave-eared torrent frogs also hear and respond to the sounds.
Study shows that cells have a natural defense against HIV
Scientists here have discovered a previously unknown mechanism that cells use to fight off the human immunodeficiency virus (HIV), the cause of AIDS.
Sweat bees social evolution
In the first study to link social evolution to climate change, Cornell University entomologists show that the social behavior of many species of sweat bees evolved simultaneously during a period of global warming.
Janus particles offer new physics, new technology
In Roman mythology, Janus was the god of change and transition, often portrayed with two faces gazing in opposite directions. At the University of Illinois at Urbana-Champaign, Janus particles are providing insight into the movement of molecules, and serving as the basis for new materials and sensors.
Researchers unlock new information about how cells determine their functions
Researchers at the University of California, Riverside have discovered a molecular mechanism that directs the fate and function of cells during animal development. The findings could hold promise for the advancement of cancer and stem-cell research.
Leave it to salmon to leave no stone unturned
Like an armada of small rototillers, female salmon can industriously churn up entire stream beds from end to end, sometimes more than once, using just their tails.
PDT kills drug-resistant bacteria, fungus in lab
Photodynamic therapy may be an effective treatment for fungal infections and certain bacterial infections of the oral cavity, including some that are resistant to antibiotics, research from the University at Buffalo's School of Dental Medicine has shown.
Researchers quantify stratosphere damage with an eye toward ozone hole recovery
A new atmospheric model is able to quantify man-made versus naturally occurring damage to the stratosphere with an eye toward repairing the diminishing ozone layer that is located within the stratosphere.
Structural study shows how bacteria select their most virulent proteins
Salmonella poisoning, dysentery, the plague, typhoid fever, and a number of other serious ailments are caused by a diverse group of bacterial pathogens that have one thing in common: They all use the same syringe-like system to infect their hosts.
Nutritional friend or foe? Vitamin E sends mixed messages
One of the most powerful antioxidants is truly a double-edged sword, say researchers at Ohio State University who studied how two forms of vitamin E act once they are inside animal cells.
Tastier tomatoes in the future?
Tomatoes are good for you. They strengthen the immune system and can prevent heart and circulatory disease. Now, researchers from the Max Planck Institute of Molecular Plant Physiology, in co-operation with Israeli scientists, have identified DNA fragments in tomatoes that make their contents both healthy and tasty.