Celebrating Darwin

Tortoises of the Galápagos
Ten subspecies of these giant reptiles still exist in the Galápagos. Those found in lush habitats with ample vegetation near the ground tend to have short legs and dome-shaped shells, while those in drier environs have longer legs and "saddleback" shells that enable them to stretch up their neck to reach food.

• A New Evolution Fight at the SIte of the Scopes Monkey Trial