Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Enamel is hardest substance in the human body.
61
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
The human brain doesn't stop developing until about 25 years old.
102
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127