Cats and dogs can hear ultrasound.
350
The colossal squid has the largest eyes in the world.
4
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Jellyfish as a species are actually older than dinosaurs and sharks.
383
Sharks have been on the planet longer than trees.
14
When dragonflies mate, their tails form a love heart.
22