After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
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The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Our brains have a negativity bias and will remember bad memories more than good ones.
15
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
There are about 255 babies born worldwide every minute.
46