New Scientist |
Ultrasonic micro-explosions can harvest gold from old SIM cards
New Scientist Ultrasonic micro-explosions can harvest gold from old SIM cards. Old SIM cards are good as gold. Cludio Policarpo/EyeEm/Getty. By Andy Coghlan. There's gold in them thar SIM cards, but most of it gets thrown away – $22.2 billion was wasted in 2016 ... |
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