It has been widely assumed that, in single-celled organisms, each cell perceives its environment -- and responds to stress conditions -- individually. Likewise, it had been thought that cells in multicellular organisms respond the same way. But scientists have now discovered otherwise. In studies of the worm C. elegans, they found that authority is taken away from individual cells and given to two specialized neurons to sense temperature stress and organize an integrated molecular response for the entire organism.

Men who consumed high saturated fat diets (HSF) were younger and had higher BMIs at diagnosis than men with who consumed low saturated fat diets (LSF). Saturated fats were most commonly consumed as beef steaks, cheese and cheese spreads, hamburgers and cheeseburgers, eggs, ice cream and salad dressings.

New research on cane toads in Northern Australia has discovered a way to control the cane toad invasion using parasites and toad communication signals. Biologists says that controlling toads has been difficult as things that kill them will often kill frogs. Professor Shine and his team studied cane toads in Queensland that lagged behind the invasion front and found they were infected with a lungworm parasite which slows down adults and, in laboratory tests, kills around 30% of baby toads.

A tiny modification called methylation on estrogen receptors prolongs the life of these growth-driving molecules in breast cancer cells. Most breast cancers contain estrogen receptors, which enable them to grow in the presence of the hormone estrogen. Their presence can determine whether tumors will respond to the estrogen-blocking drug tamoxifen. The finding will help researchers sort out how mutations change the estrogen receptor's function and allow some breast cancers to resist tamoxifen.

NASA engineers Thursday successfully completed the first series of tests in the early development of the J-2X engine that will power the upper stages of the Ares I and Ares V rockets, key components of NASA's Constellation Program. Ares I will launch the Orion spacecraft that will take astronauts to the International Space Station and then to the moon by 2020. The Ares V will carry cargo and components into orbit for trips to the moon and later to Mars.

Millions of American teens report experiencing weeks of hopelessness and loss of interest in normal daily activities and many of these depressed teens are using marijuana and other drugs, making their situation worse, according to a new White House report.

Which is better, giving more food to a few hungry people or letting some food go to waste so that everyone gets a share? A new study finds that most people choose the latter, and that the brain responds in unique ways to inefficiency and inequity.

Scientists working with diabetic mice have examined in unprecedented detail the immune cells long thought to be responsible for type 1 diabetes. They caught the immune cells, known as dendritic cells, "red-handed": they were carrying insulin and fragments of insulin-producing cells known as beta cells. This can be the first step in a misdirected immune system attack that destroys the beta cells, causing diabetes.

Research done by the US Department of the Interior to determine if global warming threatens the polar bear population is so flawed that it cannot be used to justify listing the polar bear as an endangered species, according to a new study. The Interior Department has been ordered to make a determination by May 15.

People with diagnosed diabetes are nearly twice as likely to have arthritis, and the inactivity caused by arthritis hinders the successful management of both diseases, according to a new Morbidity and Mortality Weekly Report study. This is one of the first studies of its kind to look at the relationship between arthritis and diabetes and the outcomes associated with physical activity.

The crew of the International Space Station (ISS) is presently testing a Swedish space gym. The aim is to counteract muscle atrophy and osteoporosis in astronauts. Astronauts who spend a long time in space can face problems when they return to earth. Weightlessness atrophies the muscles and decalcifies the skeleton. It doesn't help to "pump iron." Barbells and dumbbells are also weightless on a space voyage.

The newest version of the Greenhouse gases, Regulated Emissions and Energy use in Transportation model will provide researchers with even more tools to evaluate and compare the environmental impacts of new transportation fuels and advanced vehicle technologies. The newest update released May 9 will allow scientists to model combustion of ethanol produced from Brazilian sugarcane and used by U.S. automobiles; production and use of bio-butanol as a potential transportation fuel; and production and use of biodiesel and renewable diesel via hydrogenation, coal/biomass co-feeding for Fischer-Tropsch diesel production and various corn ethanol plant types with different process fuels.

President Bush has a bill on his desk, the Genetic Information Nondiscrimination Act (GINA), which will prohibit discrimination on the basis of genetic information with respect to health insurance and employment. He is expected to sign the bill, but is science - and the people - ready?

International study discovers 10 new genes related to human growth. This meta-analysis, published in the latest issue of Nature Genetics, is based on data from more than 26,000 study participants.

It has long been known that type 2 diabetes is linked to obesity, particularly fat inside the belly. Now, researchers at the Joslin Diabetes Center have found that fat from other areas of the body can actually reduce insulin resistance and improve insulin sensitivity.

A woman who has baffled doctors with her ability to remember every detail of every day has broken her anonymity to speak of her condition.

The low-watt firehouse bulb has been burning continuously since 1901. It's generated awe and respect, even among the boosters of a Texas rival.

Google is saying goodbye (adios, sayonara, whatever) to "Hello," Picasa's photo sharing service which was part of the Picasa acquisition in 2004.

Socrates (470-399 BC) may have lived centuries ago but the methods connected with him never go out of date. Socratic methods(1) have developed independently in various countries. They all describe similar methodological steps - an opening question is answered by all participants and followed by cooperative, critical analysis. Finally, the new ideas are connected to the everyday life experience of the participants.

Among four year-olds attending Head Start programs in New York City, those who had older siblings were more likely to experience respiratory symptoms including an episode of wheezing in the past year than those who were born first.

Science has provided the souped-up seeds to feed the world, through biotechnology and old-fashioned crossbreeding.

Cross-sectional studies, which collect information at a single point in time, generally find that young Americans report having more lifetime alcohol problems than older Americans, despite having had less time to develop these problems.