This composite shows what bones were found and what the Sustut dinosaur may have looked like 70 million years ago. A partial dinosaur skeleton unearthed in 1971 from a remote British Columbia site is the first ever found in Canadian mountains and may represent a new species, according to a recent examination by a University of Alberta researcher.

New evidence shows that the brains of adults with autism are "wired" differently from people without the disorder, and this abnormal pattern of connectivity may be responsible for the social impairments that are characteristic of autism.

Conserving biodiversity must be considered when developing plans to reduce greenhouse gas emissions from deforestation, researchers warn in today's edition of Science.

Researchers have discovered an unknown regulator of fat and cholesterol production in the liver of mice, a significant finding that could lead to new therapies for lowering unhealthy blood levels of cholesterol and fats.

MIT researchers have figured out how bacteria ensure that they respond correctly to hundreds of incoming signals from their environment.

Recombination at centromeres is higher than anywhere else on the chromosome, even though methyltransferases do their best to prevent it, say Jaco et al., as published in the June 16 issue of the Journal of Cell Biology.

After a stroke, even unaffected areas of the brain are at risk – depolarization waves arise at the edges of the dead tissue and spread through the adjacent areas of the brain. If these waves are repeated, more cells die. This has previously been observed only in animal studies.

Clinical trials hoping to identify a vaginal microbicide that is both safe and effective against HIV have all but skirted questions befitting the evaluation of an approach intended primarily for sexually active women of childbearing age: What if a woman becomes pregnant while using a product? Can exposure to a product, especially early in pregnancy, pose a risk to the developing fetus? Does pregnancy affect how a particular microbicide is supposed to work?

A new national study conducted by the Harvard School of Public Health Project on the Public and Biological Security finds that, in spite of a number of food safety incidents in recent years, most Americans remain confident that the food produced in the United States is safe. However, many have concerns about the safety of imported food produced in some other countries. They also do not have high levels of confidence in parts of the U.S. food safety system and some of the organizations involved.

The development of resistance to anticancer chemotherapeutic agents remains a large problem. In some cases, such resistance is associated with altered control of a cellular process known as translation, which is central to the generation of proteins. New data, generated by Jerry Pelletier and colleagues, at McGill University, Montreal, have identified a drug that can enhance the sensitivity of mouse cancer cells to standard anticancer chemotherapeutic agents.