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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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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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