Cats recognise the voice of their owner, but never evolved to care.
22
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
When dragonflies mate, their tails form a love heart.
22
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Only 3% of bird species have penises.
0
Penguins have a gland above their eye that turns saltwater into freshwater.
12