When scientists sequenced the DNA of a woman who lived to 117, they were not just cataloging the quirks of an extraordinary life. They were probing a question that touches every family: why do some ...

A newly identified and rare genetic variant slows the growth of mutated blood stem cells, researchers report, and it reduces the risk of leukemia. The ...

The year’s most notable findings also include insights into dog and sheep domestication and a new species of manta ray in the ...