Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Dogs sometimes fake being sick to get attention.
26
Lobsters have blue blood.
476
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cats recognise the voice of their owner, but never evolved to care.
22
Whales and dolphins can't taste anything other than salt.
11