The elephant brain weighs about 6,000g.
274
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12