Smithsonian Institution
Kids'castle: The Tail of the Whale
A great article abstract about Orca whales. Use this site to learn how whales travel great distances, and about the personal struggle of one baby orca.
Society for Science and the Public
Science News for Students: Sleepless at Sea
Can you go for a month without sleeping? Most mammals can't, but scientists have found some marine mammals that do. Find out why some orcas and dolphins don't sleep for weeks at a time.