In ‘Cheetahs Up Close,’ a startling portrait of survival in the Serengeti

Filmmaker Bertie Gregory's new documentary special captures the extreme challenges facing the world's fastest land animal.

Nearly half of reindeer have been wiped out and armadillos are in Iowa. Here’s how animals are weathering warming holidays

From Santa’s reindeer and the Hanukkah armadillo to some very festive sea worms, our changing world is changing life for creatures great and small.