Do bigger brains make smarter carnivores?

Why do dolphins evolve large brains relative to the size of their bodies, while blue whales and hippos have brains that are relatively small?

The secret life of frogs

(PhysOrg.com) -- University of Notre Dame biologist Sunny Boyd's research is a little like "Match.com" for amphibians. Say you're a female tree frog looking for a mate--how do you choose among a number of potential suitors?

page 5 from 13