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Falling ants glide back to trunk to avoid dangers of forest floor

...ystery, but evidently claws on their back legs act like grappling hooks to snag the trunk and hang on. "W...g behavior would be a definite advantage for ants, like Cephalotes, that forage at the outer reaches of branches and are in greatest danger of being knocked...

Photos show jaguar vamping for camera

...iful and he knows it. A male jaguar recently acted like he was on a fashion runway in Manhattan, rather than his home in Kaa-Iya National Park in Bolivia, when it plopped down in front of a remote "camera trap" and allowed a remarkable 35 pictures to be taken over a five-and-a-half hour period. Two days e...

Key Trigger Of Opioid Withdrawal Symptoms Found

...rs some of the withdrawal symptoms of opioid drugs like morphine and heroin. They believe that drugs to inhibit the chemical--called a transporter--could relieve some of the early physical symptoms of withdrawal, such as teeth-chattering, uncontrolled shaking, and jumpiness. Such drugs could become part ...

New Treatment Rivals Chemotherapy For Lymphoma, Study Finds

...m of the element iodine. When injected, it travels like a guided missile through the bloodstream to bind to a protein found on the surface of the cancerous cells. The radiation zaps these malignant cells with minimal exposure to normal tissues. With the Bexxar therapeutic regimen, a patient receives an i...

Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals

...iron in a non-toxic form. This metalloprotein acts like a nano-magnet and a potent MRI "reporter." A typi...interest, including therapeutic genes for diseases like cancer and arthritis, to detect where and when they are being expressed," Ahrens said. Existing met...

Family trees of ancient bacteria reveal evolutionary moves

... ago Cyanobacteria predated more complex organisms like multi-cellular plants and functioned in a world where the oxygen level of the biosphere was much less than it is today. Over their very long life span, Cyanobacteria have evolved a system to survive a gradually increasing oxidizing environment, makin...

Gene therapy for Parkinson's disease moves forward in animals

...raging to see data that it works in higher animals like monkeys." Meanwhile, in separate experiments with rats, researchers used gene therapy to completely reverse abnormal movements called dyskinesias in some of the animals, suggesting a new way to combat the flailing movements produced by a widely used...

Scientists find fossil proof of Egypt's ancient climate

...a 130,000 years ago. While that might sound a bit like relying on wooly bear caterpillars to predict the ...yses give us snapshots of what the conditions were like in that lake basin." The geochemical analyses confirmed that the water was a stable standing body f...

Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin

...and Dennis Discher in the mid-1990s, function much like the bilayered membranes of living cells. Whereas c... can then be detected. "The fluorophores function like reflectors stuck in the spokes of a bicycle tire," Therien said. "When this structure absorbs light,...

Children's taste sensitivity and food choices influenced by taste gene

... they like. We also know that many children do not like bitter taste, thereby interfering with vegetable c...t their children reject foods that they themselves like because of inborn differences in taste ability, rather than rebelliousness or defiance of authority,...

New Insights Into HIV Immunity Suggest Alternative Approach to Vaccines

...t with many proteins, including one's own tissues, like the antibodies made by innate B cells. In laboratory tests, the antibodies reacted with multiple types of human molecules, most prominently with a fat molecule called cardiolipin. "It appears the most vulnerable spots on the outer coat protein of HI...

Protein offers way to stop microscopic parasites in their tracks

...to facilitate an organ transplant. "Toxoplasma is like a time bomb that can go off and cause serious trouble when the immune system wanes or is compromised," explains L. David Sibley, Ph.D., professor of molecular microbiology at Washington University School of Medicine. For the study, researchers in Sib...

Rats infected as newborns grew up vulnerable to memory problems during an immune challenge

...ith salt water, or with nothing. In rats, Day 4 is like the third trimester in human pregnancies, a time when the brain grows significantly. Once the pups grew up, Bilbo and her colleagues tested the adults' memory about 60 days after birth. To test memory, each rat was allowed to explore a novel experim...

Artifical cornea lets woman blind 20 years see

... revolutionized the treatment and care of patients like her. "I was blind for twenty years in both my eye...y of damage to my corneas. But now my life is more like normal and I can do more things on my own and finally read the things that I want to read." While m...

Effective Cancer Treatments Follow The Clock

...in for "about a day") cycle that governs functions like sleeping and waking, rest and activity, fluid balance, body temperature, cardiac output, oxygen consumption and endocrine gland secretion. In their experiments, the researchers measured the animals' body weight as an indicator of response to the ant...

Vampire bats keep out of trouble by running

...bats of Central and South America behave much more like four-legged terrestrial mammals, in that they like to walk around on the ground; other bat species fumble helplessly when left to walk. But researchers...

Yale researchers identify molecule for detecting parasitic infection in humans

...une system to fight the infection. But parasites, like humans, are eukaryotic in origin and how the body detects them has been a mystery. The common parasite Toxoplasma gondii (T. gondii) causing toxoplasmosis, has a complicated life cycle in which it is transmitted from mice to cats and then to humans....

A new study examines how shared pathogens affect host populations

...species of agricultural importance. Many pathogens like malaria, Lyme disease or West Nile encephalitis that infect multiple hosts are commonly transmitted by vectors, and their transmission rate is often thought to depend on the proportion of hosts or vectors infected (i.e. frequency dependence). A study...

Potential treatments for neurofibromatosis

...cell division takes off and tumors develop. "It's like an engine being driven at full speed," said Dr. Clapp. To encourage development of the blood vessels they need, the tumors emit chemical signals that cause the mast cells to congregate in tissues surrounding the tumors. The mast cells create chemica...

Live fast, die young true for forests too

...ead author of the article. "You can view a forest like a bank account," said Stephenson. "As long as depo... far has been given to things that stress forests, like increased drought," said USGS scientist Phil van Mantgem, the study's co-author. "Less attention ha...

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