Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Contrary to popular beliefs, chocolate does not cause acne.
63
Enamel is hardest substance in the human body.
61
Like fingerprints, everyone's tongue print is different!
71
The lense of the eye continues to grow throughout a person's life.
34
The human heart creates enough pressure to squirt blood 30 ft.
37