Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
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
Domestic pigs average a top speed of about 11 miles per hour.
182
The elephant brain weighs about 6,000g.
274
The oldest recorded elephant lived for 82 years.
213
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40