The reindeer is the only mammal that can see UV light.
17
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
Alligators can live up to 100 years.
337
Squirrels forget where they hide about half of their nuts.
698
The Basenji dog is the only dog that is not able to bark.
4
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12