Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
It takes about 20 seconds for a red blood cell to circle the whole body.
102