Click above to listen to part 3 of For Good Measure, featuring Wolfgang Ketterle, physicist at MIT and Nobel Laureate, explaining the new definition of the kilogram, which is derived from the mass of photons.
For Good Measure:
Part 1: The Banana Challenge
Part 2: Jon Pratt / The Old Kilogram
Part 3: Wolfgang Ketterle / The New Kilogram
Part 4: Simon Winchester / The Price of Precision
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Big Picture Science is an immersive radio show and podcast that reveals the unexpected connections in science.
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Molly Bentley Executive Producer and Co-Host, Big Picture Science
Seth Shostak Producer and Co-Host, Big Picture Science
Senior Astronomer, SETI Institute
