Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Early American humans hunted car-size armadillos and used their shells for houses.
12
You forget 90% of your dreams.
256
Our brains have a negativity bias and will remember bad memories more than good ones.
15
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
160
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Babies crawl an average of 200m a day.
212