Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
The reindeer is the only mammal that can see UV light.
17
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Sharks, like other fish, have their reproductive organs in their chests.
248
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
A scorpion can hold its breath for up to 6 days.
19