Doomed to die on unfamiliar islands, small populations of lizards have defied the experts and adapted to their new homes by undergoing the kind of body changes that could in time transform each island's population into a separate species.
Some baby girls with Turner's syndrome beat the odds. All male fetuses missing the X chromosome--the syndrome's underlying cause--are spontaneously aborted, as are 97% of female fetuses, which have a backup copy of the sex chromosome.
A vaccine consisting of genes from HIV, the AIDS virus, has suppressed infection in two chimpanzees injected with the virus itself. But experts caution that the vaccine, described in next month's issue of Nature Medicine, may not offer protection from more virulent HIV strains.
Naturalist John James Audubon, renowned for his intricate paintings of North American birds, was born on 26 April 1785 in what is now Haiti. Audubon grew up in France and emigrated to the United States in 1803.
Wine aficionados sampling a Cabernet Sauvignon may be able to sniff out the vineyard that made it and the year it was bottled, but they can't pierce the hazy origins of one of the world's most coveted wine grapes.
Most patients with Alzheimer's disease seem to have inherited high levels of a mutant enzyme. The finding, reported in tomorrow's issue of the Proceedings of the National Academy of Sciences, could lead to a diagnostic test for the disease.
PARIS--Luc Montagnier, whose group here at the Pasteur Institute first isolated the AIDS virus in 1983, is teaming up with an American businessman to create a new research institute in cell and molecular biology at Queens College in Flushing, New York.
If there is one theme uniting life-forms from the lowliest virus to the loftiest primate, it's that they all evolve. Now some lifeless strands of RNA are doing the same thing in a California laboratory.
April showers bring May flowers. With a little genetic engineering, they could soon last until June. By transplanting a mutant gene into a petunia, researchers have created a flower that keeps its petals four times as long as nature intended.
High daily doses of vitamin E seem to help people with Alzheimer's live on their own for about 7 months longer than untreated patients, scientists have found. Another drug, currently prescribed for Parkinson's disease, has a similar effect.
Women who have mutations in either of two genes, BRCA1 and BRCA2, have a dramatically increased risk of breast cancer. But researchers have had a hard time figuring out what role these two genes normally play--and why disrupting them has such a devastating effect.