How Whales Will Save The World – If We Let Them

For a thousand years humans systematically hunted whales for their meat, oil, and bone. Some whale populations were reduced by as much as 90%. But now that they're being protected, scientists are realizing the critical role that whales play in balancing marine ecosystems. Here are four ways they keep oceans healthy. » 8/06/14 11:15am 8/06/14 11:15am

How whales made the dramatic evolutionary shift from land to the sea

All whales and dolphins are descended from terrestrial mammals, ancient creatures that were very similar to the modern hippopotamus. Now, a fascinating new genetics study shows the incredible evolutionary changes these animals had to experience to become the perfectly adapted marine animals we see today. » 11/25/13 7:40am 11/25/13 7:40am