Most dust particles in your house are made from dead skin!
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
One 75-watt bulb gives more light than three 25-watt bulbs.
57
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Scientists are now able to grow 'beating' heart tissue in a lab!
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