Beavers can swim half a mile underwater on one gulp of air.
31
To find out if a watermelon is ripe, knock it, and if it sounds hollow then it is ripe.
84
The largest breed of rabbit is the Flemish Giant.
65
Only 3% of bird species have penises.
0
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
When you shave a guinea pig it looks like a little hippo.
19
Crocodiles swallow stones to help them dive deeper.
55