The elephant brain weighs about 6,000g.
274
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
Giant Anteaters' front legs look like a panda.
48
There's a rare breed of pig that looks like a sheep.
14