How can two mice sharing exactly the same DNA become so different? The answer lies in the epigenome, a kind of second genome that all animals have, including humans. The epigenome dictates which ...

In a quest to understand complex speech, scientists inserted what's been dubbed a human “language gene” into mice. Remarkably, the genetic tweak had a profound impact on the little rodents ...

But female mice, which live longer than males, have different genes associated with longer life spans than male mice. Study coauthor Robert Williams, a geneticist at the University of Tennessee, says ...