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Nearly 99 percent alike in genetic makeup, chimpanzees and humans might be even more similar were it not for what researchers call “lifestyle” changes in the 6 million years that separate us from a common ancestor. Specifically, two key differences are how humans and chimps perceive smells and what we eat.

A massive gene-comparison project involving two Cornell University scientists, and reported in the latest issue of the journal Science (Dec. 12, 2003), found these and many other differen

New findings may have implications for the stability of today’s climate

Scientists at the University of California, Riverside and Columbia University have found evidence of the release of an enormous quantity of methane gas as ice sheets melted at the end of a global ice age about 600 million years ago, possibly altering the ocean’s chemistry, influencing oxygen levels in the ocean and atmosphere, and enhancing climate warming because methane is a powerful greenhouse gas. Th

Of all the personal computers to be unwrapped during the holiday season, more than 80 percent will be used to go online and search the Web’s more than 92 million gigabytes of data (comparable to a 2 billion-volume encyclopedia). Getting online is the easy part, finding a useful Web page is a bit harder-keeping track of a useful Web page is another issue altogether.

People have devised many tricks-such as sending e- mails to themselves or jotting on sticky notes-for keeping track of Web pa

Duke University Medical Center researchers have identified the second of three genes that can each independently cause the disorder known as cerebral cavernous malformations (CCM), which is characterized by mulberry-like clusters of blood vessels in the brain. The finding paves the way for a new genetic test for the rare, familial disease, which typically lies dormant in patients for decades before its potentially devastating symptoms appear, said the researchers.

The vessel lesions in the

By studying the “memory” of the respiratory system, a group of researchers from the University of Wisconsin-Madison have identified a key player – a protein called BDNF that’s involved in learning – responsible for the body’s ability to keep breathing properly, despite the challenges it may face.

The findings, published Dec. 14 in the online edition of Nature Neuroscience, could provide ideas of new drug targets, which could lead to new treatments for or ways to prevent a number of

AIDS immunisation is still to be improved. Russian scientists suggest that rectal vaccination could be the most effective prevention of HIV transmission. The work is supported by the Interdepartmental Research and Technical Program “Vaccines of new generation and medical diagnostic systems of the future”.

Researchers all over the world strive to obtain a vaccine preventing AIDS. Most promising are DNA-vaccines, which contain genes of human immunodeficiency virus. These genes function within