A scorpion can hold its breath for up to 6 days.
19
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
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
Cats lose almost as much fluid in the saliva while grooming themselves as they do through urination!
205
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12