Guess who played at the White House Correspondents' Jam?

Dolphin returns to the ocean with a helping hand from humans

Skateboarders shred Dubai's waterpark

Watch these elaborate animal courtship rituals performed by humans

Gray whales swim through kelp in this zen-inducing video

11 amazing antics of ants

Orphaned puppy finds new family with cats

As U.N. makes history on Earth Day, Leonardo DiCaprio reminds us not to rest on laurels

Leopard cub demonstrates proper catnap technique

Dolphin's birth brings cheers at Shedd Aquarium

Short documentary delves into Alzheimer's disease

Brighten up breakfast with rainbow waffles