Evolution picks up hitchhikers

In a twist on "survival of the fittest," researchers have discovered that evolution is driven not by a single beneficial mutation but rather by a group of mutations, including ones called "genetic hitchhikers" that are simply along for the ride.

Team uses whole islands to test survival of the fittest

For some people, fruit flies and a tank just aren't enough. Two Dartmouth biologists have been using whole islands in the Caribbean to investigate evolution in lizards.