Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Medical research has found substances in mistletoe that can slow down tumor growth.
32
Your thumb is about the same size as your nose.
124
Every day, the average person swallows about a quart of mucous.
5
You see your nose at all times, your brain just chooses to ignore it.
30
In one day, adult lungs move about 10,000 litres of air.
11
The human brain has the capacity to store everything that you experience.
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