Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
The human brain has the capacity to store everything that you experience.
4k
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
All the chemicals in a human body combined are worth about 6.25 euro (if sold separately).
266
The human brain doesn't stop developing until about 25 years old.
102
Your heart will pump about 212 million liters in its lifetime.
26