Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
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
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The elephant brain weighs about 6,000g.
274