06 September 2006, 12:22 PM ET
Scientists are baffled by the appearance but say it could have been intended as someone's dinner.
19 July 2006, 09:00 AM ET
The most feared creatures at the top of a food chain maintain equilibrium, but humans often disturb this delicate balance.
31 May 2006, 05:30 AM ET
Researchers found eight previously unknown species of small creatures in a newfound underground cave.
04 January 2006, 08:01 AM ET
Overfishing of some deep-sea fish could affect the rest of the ocean.
14 October 2005, 07:28 AM ET
New study finds more than just a disgusting world inside both feather and synthetic pillows.
17 August 2005, 09:00 AM ET
Scientists want to import endangered animals from Africa to restore America's ecosystem to a prehuman state.
10 January 2004, 02:00 AM ET
This desert city is lush, creating a unique oasis for people and animals. In the new thinking, pollution is part of the ecosystem.