Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20
The earth is approx. 6,588,000,000,000,000,000 tons.
175
One third of the electricity produced on earth is used to power electric light bulbs!
75
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