Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
One in three dog owners say they have talked to their pets on the phone.
427
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
The Basenji dog is the only dog that is not able to bark.
4
Tigers can see 6 times better at night than humans.
305
Cats recognise the voice of their owner, but never evolved to care.
22
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17