BBC - Precision The Measure of All Things (2013) Part 3 Heat Light and Electricity

Series in which Professor Marcus du Sautoy explores why we are driven to measure and quantify the world around us and why we have reduced the universe to just a handful of fundamental units of measurement. From the first cave paintings of Cro-Magnon man to today's atomic clocks, he shows how our human desire for ever greater precision has changed the course of history and society.

Part 3: Light, Heat and Electricity

From lightning bolts and watt engines to electromagnetic waves and single electrons, Professor Marcus du Sautoy continues his journey into the world of measurement as he reveals how we came to measure and harness the power of heat, light and electricity. It's a journey that has involved the greatest minds in science and, today, is getting down to the very building blocks of atoms.

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