Enamel is hardest substance in the human body.
61
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
In one day, adult lungs move about 10,000 litres of air.
11
The human brain doesn't stop developing until about 25 years old.
102
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Our brains have a negativity bias and will remember bad memories more than good ones.
15