Cats and dogs can hear ultrasound.
350
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Whales and dolphins can't taste anything other than salt.
11
Ants have tiny magnetic compasses in their antennae which help them navigate.
9