Enamel is hardest substance in the human body.
61
The human brain doesn't stop developing until about 25 years old.
102
Research has determined that most people are happiest at 7:26pm on a Saturday night.
70
The human sigh acts as a physiological reset button.
23
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
Pain occurs when sounds are above 130 db.
123