Cats recognise the voice of their owner, but never evolved to care.
22
Cats sleep for 70% of their lives.
8
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Sharks have been on the planet longer than trees.
14
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
The reindeer is the only mammal that can see UV light.
17
The seahorse is the only fish to have a neck.
12