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BBC Radio 4
on BBC Radio 4 FM

The latest developments in science explored by Geoff Watts. The earth is a giant magnet which reverses polarity every 700,000 years, and the latest change is overdue. What will happen the next time north turns to south, weakening the earth's magnetic field, jeopardising satellite technology and intensifying the sun's cosmic rays? Producer Rami Tzabar. E-MAIL: [address removed]

Contributors

Unknown:
Geoff Watts.
Producer:
Rami Tzabar.
Source: Radio Times

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