If the human eye was a digital camera, it would have 576 megapixels.
25
In one day, adult lungs move about 10,000 litres of air.
11
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Obsessive nose picking is called Rhinotillexomania.
101
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
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
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139