You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
In one day, adult lungs move about 10,000 litres of air.
11
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
A human being loses an average of 40 to 100 strands of hair a day.
133
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
