Endangered Species

Bid farewell to Nola, one of the last northern white rhinos on Earth

6 of the world's most endangered trees also look the strangest

12 facts to change the way you see elephants

16 of the world's most endangered vulture species

Lions may be in more danger than we thought

Meet the winners and losers of climate change

Tracking British Columbia's secretive sea wolf

Glowing sea turtle is the first biofluorescent reptile ever found

Colorful 'ghost' bird finally caught in photos

Rare snubfin dolphin photographed in Australia

Baiji dolphins resurrected as soaring driftwood skeletons

5 startling statistics about rhinos