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
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
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MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
The light hitting the earth right now is 30 thousand years old.
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If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
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Electric lights for trees were first used in 1895.
62
The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
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