Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
Our Right Lungs takes more air than our left lung.
194
On average, there's 100 billion neurons in the human brain.
83
In one day, adult lungs move about 10,000 litres of air.
11
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
If the human eye was a digital camera, it would have 576 megapixels.
25