Wearing headphones for an hour increases the bacteria in your ear 700 times.
233
Your heart will pump about 212 million liters in its lifetime.
26
Your heart rate can rise as much as 30% during a yawn.
69
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Lack of water is the #1 trigger of daytime fatigue.
148
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39