When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
In one day, adult lungs move about 10,000 litres of air.
11
A person can live without food for about a month, but only about a week without water.
156
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Babies crawl an average of 200m a day.
212
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Mushrooms are more closely related to humans than they are to plants.
47