Some inventions are so simple that it’s hard to improve them. The magnetic compass is a great example — a magnetized needle, a bit of cork, and a bowl of water are all you need to start navigating the ...
12don MSN
In 1820, a physicist noticed a compass twitch near a wire, and electromagnetism changed science
In the year 1820, a pivotal moment in science emerged when Danish physicist Hans Christian Ørsted made an astonishing ...
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