After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Babies crawl an average of 200m a day.
212
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Only humans shed emotional tears.
331
The average person will go on a date at least 100 times before they finally marry.
33
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13