Steller's sea lions are rapidly disappearing from Alaska's waters, and no one knows why. A broad combination of factors could be responsible.

NATURE investigates the sometimes exasperating efforts of people and wild animals to adapt to each other when their worlds collide.

Beneath Antarctica's frozen seas lies one of Earth's most stable and vibrant ecosystems -- and one of its most enchanting realms. Visit a fantastic world hidden "Under Antarctic Ice."

Both humans and animals seem to be hard-wired to find youngsters adorable. Baby Tales explores the reasons why the young play on our heart strings.