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 is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
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
The human brain has the capacity to store everything that you experience.
4k
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
The human brain uses approximately as much energy as a 10 watt light bulb.
120