Cats and dogs can hear ultrasound.
350
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
Whales and dolphins can't taste anything other than salt.
11
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12