A hummingbird weighs less than a penny.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Alligators can live up to 100 years.
337
Cats recognise the voice of their owner, but never evolved to care.
22
The giant squid has the largest eyes in the world.
62
Starfish don't have brains.
132
A group of kangaroos is called a mob.
28
The Giant South African Earthworm can grow up to 22 feet long and 1 inch in thick.
37