The colossal squid has the largest eyes in the world.
4
Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
26
Sheep, goats, octopuses, and toads have rectangular pupils.
7
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
Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
16
Cats recognise the voice of their owner, but never evolved to care.
22
A lion in the wild usually makes no more than twenty kills a year.
186