It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
Your heart will pump about 212 million liters in its lifetime.
26
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
In one day, adult lungs move about 10,000 litres of air.
11
