Eastern Pennsylvania is home to beautiful farmlands and countryside, but it's also a gold mine of information for geneticists, who have studied the region's Amish culture for decades. Because of their ...

In the northern hemisphere, glacial periods have had profound and lasting effects on the population genetics of numerous species, with founder effects often persisting for many generations in formerly ...

A study of birds on Pacific islands shows conclusively that the formation of new species is a gradual and not a sudden process, according to biologists from the UK, France, Australia and the USA ...