A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
The world’s largest frog, the Goliath frog, can grow over 13 inches in length and can jump up to 10 feet in a single bound.
8
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
-12
When dragonflies mate, their tails form a love heart.
22
Cats recognise the voice of their owner, but never evolved to care.
22