A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
Female kangaroos have three vaginas.
2