This week’s five facts:
1. The word "volcano" originally comes from the name of the Roman god of fire, Vulcan.
2. The Emperor Penguin is able to dive to depths of over 500m and stay under water for up to 27 minutes.
3. Snakes can open their mouth up to 150 degrees.
4. The distinctive smell of Crayola crayons comes from beef fat.
5. In their first year of life, baby blue whales gain 200 pounds (91 kg) every day.