Toucans manage their body temperature by adjusting the blood flow to their beak as more blood means more heat release. Due to this, the creatures sleep on their beak to conserve heat.

A person can live without food for about a month, but only about a week without water. If the amount of water in your body is reduced by just 1%, you’ll feel thirsty. If it’s reduced by 10%, you’ll die.

There is a snake, called the boomslang, whose venom causes you to bleed out from every orifice on your body. You may even turn blue from internal bleeding, and it can take up to 5 days to die from the bleeding.