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Physics Facts

Tick-Tock Atomic Clock

Modern navigators rely on atomic clocks. Instead of old-style springs or pendulums, the natural resonances of atoms -- usually cesium or rubidium -- provide the steady 'tick' of an atomic clock. The ... Continue reading

24 GPS satellites orbit Earth.

The Sound of Turbulence

Do you ever watch the water tornado that forms in a draining bathtub? Woe unto any rubber ducky floating aimlessly in the vicinity; the water's force will pull it down into the tornado. The center of ... Continue reading

Smoke demonstrates the wakes caused by this jet.

Delivered by TIR

The content of this article has been delivered to you via internet fiber-optic links. Today most phone conversations, fax transmissions and almost all internet and email traffic travel at the speed of ... Continue reading

Fiberoptic cable

Poincare's Chaos

Over two hundred years after Newton published his laws of planetary motion the King Oscar II of Sweden and Norway sponsored a most unusual competition that would discover a whole new science. ... Continue reading

Jules Henri Poincare (1854-1912)