Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
In one day, adult lungs move about 10,000 litres of air.
11
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
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
The human sigh acts as a physiological reset button.
23
Poor eyesight (myopia) is associated with higher IQ.
232
Mushrooms are more closely related to humans than they are to plants.
47
Tigers can see 6 times better at night than humans.
305