Cats recognise the voice of their owner, but never evolved to care.
22
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
The cat brain weighs about 30g.
167