It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Your heart will pump about 212 million liters in its lifetime.
26
Your body is creating and killing about 2.4 million red blood cells per second.
17
Yawns are more contagious among people with closer relationships.
163
Enamel is hardest substance in the human body.
61
The human brain has the capacity to store everything that you experience.
4k
One human hair can support 3 ounces.
191