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 largest cell in the human body is the female egg and the smallest is the male sperm.
682
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The human sigh acts as a physiological reset button.
23
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18