Farmer discovers woolly mammoth near Detroit

Ginseng demand boosts prices and poaching

Tracking British Columbia's secretive sea wolf

Help the urban foxes of Silicon Valley go high-tech

Shell backs off Arctic 'for the foreseeable future'

Park vs. refuge: What's the difference?

Colorful 'ghost' bird finally caught in photos

Vinegar is suddenly sweet for Great Barrier Reef

Why do giraffes hum at night?

War-torn Gorongosa Park makes a comeback

5 startling statistics about rhinos

New 'tree of life' links 2.3 million species

Freaks of Nature

Stories You Won't Believe