Evolving the ability to run may also have made our ancestors smarter, suggesting that exercise can be healthy for the brain as well as the body.
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Two whole genome duplications boosted the complexity of the ancestor of all vertebrates, but also introduced potential for disease.
After treating terminally ill patients with an unauthorized experimental probiotic procedure, two California doctors can no longer participated in human research.
Genomic analyses reveal that the polar bear evolved between 4 and 5 million years ago, far earlier than previous studies had estimated.
A relatively new pair of sex chromosomes in the fruit fly allows researchers to track their evolution from the beginning.
The federal agency's surveillance of staffers feared to be leaking confidential information about medical devices was wider than previously thought.
Chemists are already finding ways to circumvent a new federal law cracking down on marijuana and methamphetamine mimics.
Researchers breed fruit flies that, after 40 generations of conditioning, have acquired the ability to react to numbers.
Guppies with experimentally shrunken brains produced more offspring than guppies bred for larger noggins, confirming a long suspected tradeoff of bigger brains.
A new study finds that an Alaskan population of the fish has quickly evolved in response to warming temperatures.
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