How Magnet Fishers Catch Underwater Garbage, Guns and Sometimes Treasure
How Magnet Fishers Catch Underwater Garbage, Guns and Sometimes Treasure
www.scientificamerican.com Searching for Underwater Treasure with Magnet Fishers
With the help of a powerful rare-earth alloy, magnet fishers pull garbage out of polluted waterways
1 comments
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... Toss magnet in water
Pull magnet out of water...
Repeat.
What's to explain?