Tim and Gwen tell PEOPLE that their 17-year-old son, Gus, is "brilliant, hyper-aware of details that many of us pass by, and above all else, he’s an excellent son" Virginia Chamlee is a Politics ...

So the adaptation to a changed environment led to a larger-beaked finch population in the following generation. Adaptation can go either way, of course. As the Grants later found, unusually rainy ...