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Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
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ScienceShot: Snakes' Slitherin' Subterranean Kin
18 September 2012 7:01 pm
They came from below: Most modern groups of living snakes evolved from a burrowing ancestor, scientists report today in Biology Letters. The researchers rearranged the snake-and-lizard portion of the reptilian family tree based on a genetic analysis that examined DNA sequences in 44 genes from 161 species—representing most families of lizards and snakes alive today. Most groups of living snakes—including species as diverse as (clockwise from upper left) palm vipers, Indian cobras, green snakes, and timber rattlesnakes—are genetically most closely related to the Anomalepididae family of burrowing blind snakes. The new study is the largest of its kind, the researchers say; previously, the largest such study considered less than half the number of genes and less than one-third the number of species.
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