A cesium atom in an atomic clock beats over nine billion times a second.
43
Most dust particles in your house are made from dead skin!
67
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
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
One 75-watt bulb gives more light than three 25-watt bulbs.
57
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.
39
No matter how cold it gets, gasoline will not freeze.
107