Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
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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
One cubic foot of gold weighs more than 1,200 pounds!
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Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20
The storage capacity of human brain exceeds 4 Terrabytes.
140
Pure water (H2O) does not conduct electricity on its own.
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