Why does heat wipe out a magnet?

The making of magnetism, plus polluting the solar system, entropy and long sight...
03 September 2021
Presented by Chris Smith with Zain Johnson, 567 CapeTalk. 
Production by Chris Smith.

MAGNETIC FIELD

Magnetic lines of force of a bar magnet shown by iron filings on paper from Practical Physics, publ. 1914 by Macmillan and Company

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This week we ask whether we're about to start spoiling other planets with our space forays, if there is antimatter in the human body, what causes cluster headaches, whether microwaving can ripen avocado, what causes long-sight, how atomic clocks operate, the basis of entropy and thermodynamics, why heat wipes out a magnet, and whether cleaning surfaces is a good idea for combating Covid-19...

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