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The foot is a most easily accessible tool and it had a lengthy history as a means of measuring before the introduction of national and international standards. So how were earlier standards created? In this short video from 1981, the British physicist Reginald Victor Jones demonstrates a clever methodology for finding the length of an average foot illustrated in a 16th-century German geometry book. The video is excerpted from Jones’s 1981 Royal Institution Christmas Lecture series ‘From Magna Carta to Microchip’, a marvellously dated and humorously English account of the history and principles of measurement.
Website: The Royal Institution
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Fairness and equality
How the first woman of colour to be elected to the US Congress remade education
21 minutes
video
History of ideas
Tantra is, and was, a subversive philosophy of feminine power
19 minutes
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Rituals and celebrations
From roaring fire and molten glass an artist creates a healing ritual
13 minutes
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Ecology and environmental sciences
Producing food while restoring the planet – a glimpse of farming in the future
7 minutes
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Archaeology
Ancient Greek sculptures were colourful. Why does the white marble ideal persist?
6 minutes
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Astronomy
From zero to 5,000 – music and visuals express 30 years of exoplanet discoveries
1 minute
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Economics
We all play by economic rules set by men. What could a feminist economics look like?
30 minutes
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Ecology and environmental sciences
Yo-Yo Ma performs a work for cello in the woods, accompanied by a birdsong chorus
4 minutes
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Art
‘Long Live Degenerate Art’ – how a Surrealist group in Cairo defied repression in 1938
4 minutes