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viernes, 4 de septiembre de 2015

THE SCIENCE OF ELECTRICITY: THE POWER GRID

Source: Heaven´s Harvest.

Source: Documentary Channel 

The power to make night into day, create life, or cause death. This is all part of the mystery and magic of electricity. Long before we knew what it was, long before we harnessed it, electricity was flowing through our bodies. Descendant from the heavens. There's current flowing everywhere. We walk around and the voltage between our head and toes is around 200 - 300 volts, and nobody notices that - because we grew up in it.

Professor Jim Al-Khalili tells the electrifying story of our quest to master nature's most mysterious force - electricity. Until fairly recently, electricity was seen as a magical power, but it is now the lifeblood of the modern world and underpins every aspect of our technological advancements.

Without electricity, we would be lost. This series tells of dazzling leaps of imagination and extraordinary experiments - a story of maverick geniuses who used electricity to light our cities, to communicate across the seas and through the air, to create modern industry and to give us the digital revolution.

Just under 200 years ago scientists discovered something profound, that electricity is connected to another of nature's most fundamental forces - magnetism. In the second episode, Jim discovers how harnessing the link between magnetism and electricity would completely transform the world, allowing us to generate a seemingly limitless amount of electric power which we could utilise to drive machines, communicate across continents and light our homes. This is the story of how scientists and engineers unlocked the nature of electricity in an extraordinary century of innovation and invention. [Video 1]


Video 1. Magic of electricity. Uploaded by Documentary Channel.

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