The elephant brain weighs about 6,000g.
274
Only 3% of bird species have penises.
0
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
Cats recognise the voice of their owner, but never evolved to care.
22
Mosquitoes don't just bite you, they also pee on you.
11
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10