Sharks have been on the planet longer than trees.
14
When cats are happy, they may squeeze their eyes shut.
10
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Cats and dogs can hear ultrasound.
350
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
A 42-foot sperm whale has about 7 tons of oil in it.
209
Cats recognise the voice of their owner, but never evolved to care.
22