The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The average person's skin weighs twice as much as their brain.
131
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
Every year your body replaces 98% of your atoms.
119
Enamel is hardest substance in the human body.
61
The human body contains over a billion miles of DNA.
147
The human brain doesn't stop developing until about 25 years old.
102