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27 November 2013 12:59 pm ,
Vol. 342 ,
The new head of the National Center for Science Education promises to "fight the good fight" against attacks on...
Analyses of the H7N9 strains isolated from four new cases show that the virus is evolving rapidly, heightening anxiety...
In 2009, Jack Szostak shared a Nobel Prize for his part in discovering the role of telomeres, the end bits of...
Science has exposed a thriving academic black market in China involving shady agencies, corrupt scientists, and...
Paper-selling agencies flourish in the aura of reputable businesses. For some scientists, it may be difficult to tell...
Data collected by satellites and floating probes have chronicled a 2-decade rise in the temperature and thickness of a...
Cholesterol, the artery-clogging molecule that contributes to cardiovascular disease, has another nasty trick up its...
Until recently, the Defense Advanced Research Projects Agency (DARPA) kept its plans for its $70 million portion of the...
- 27 November 2013 12:59 pm , Vol. 342 , #6162
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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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