In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
The human brain has the capacity to store everything that you experience.
4k
Your fingernails grow faster in summer.
744
The average sperm cell swims at 8 inches per hour.
4
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191