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1923 - Traffic Lights and Frozen Food
Episode 2 of 4
Adam Hart-Davis explores spectacular years in the history of science.
Key inventions from 1923 include a crucial part of a TV set, a packet of frozen peas, a device for separating molecules and the story of the man who made us all stop for a moment of peace at traffic lights.
Last on
Tue 9 Jun 2009
16:00
蜜芽传媒 Radio 4
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- Fri 18 Jul 2008 11:00蜜芽传媒 Radio 4 FM
- Tue 9 Jun 2009 16:00蜜芽传媒 Radio 4