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John Baird's mechanical television transmitter, in the London Science Museum

90 years since the first television broadcast by John Logie Baird

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The video signal from the television receiver (on the left) is transmitted to the neon lamp and causes its brightness to change according to the needs of the image at each point. This system produced a dim orange image, 1.5 inches (about 4 centimeters) in diameter.

The mother of the television - 90 years since the first experiment of the mechanical television

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The eruption of the volcano in Iceland, April 2010. Photo: National Geographic (for the film shown on May 9 at nine)

On May 9 at National Geographic a film about the recent volcanic eruption in Iceland

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Survival: The Philippines. The strong survive, the violent lose

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2 interesting scientific programs in the coming month on the BBC. Prime

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The day when reality swallowed the cinema

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