The Gulf's blue waters are streaked with reddish tendrils of oil. Debbie Elliott/NPR hide caption

itoggle caption Debbie Elliott/NPR

Madagascar is a hot spot of extinctions, and members of the Chamaeleonidae family are currently going extinct. Ignacio De la Riva hide caption

itoggle caption Ignacio De la Riva

Woolly mammoths originated in Africa millions of years ago, and as the ice age set in, they migrated north, developing furry coats, smaller ears and smaller tails to conserve heat. iStockphoto.com hide caption

itoggle caption iStockphoto.com