Penguins have a gland above their eye that turns saltwater into freshwater.
12
A cow produces around 200,000 glasses of milk in her lifetime.
373
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
Cats recognise the voice of their owner, but never evolved to care.
22