Monday, March 8, 2010
Land Mammals Migrating to the Water
On pages 51-52, Jerry Coyne talks about the evolution of whales from land mammals such as Indohyus, Pakicetus, Rodhocetus, and Dorudon, with each new species spending more and more of its lifetime in the water. He discusses one possible reason for why these animals went back to the water in the first place, which was the lack of competition for food from dinosaurs. This way, they could live in an environment that had abundant food and was predator-free. What other explanations are there for why land mammals moved back to the water? Provide examples and use external sources as evidence.
Posted by Sara Bahmanyar at 7:35 PM