Babies crawl an average of 200m a day.
212
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Pain occurs when sounds are above 130 db.
124
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
In one day, adult lungs move about 10,000 litres of air.
11