It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
The reindeer is the only mammal that can see UV light.
17
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14