A lion in the wild usually makes no more than twenty kills a year.
186
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Early American humans hunted car-size armadillos and used their shells for houses.
12
Cats recognise the voice of their owner, but never evolved to care.
22
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271