The cat brain weighs about 30g.
167
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Tigers can see 6 times better at night than humans.
305
The oldest recorded elephant lived for 82 years.
213
A cow produces around 200,000 glasses of milk in her lifetime.
373
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