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Despite the headline, this isn't really a story about superconductivity—at least not the superconductivity that people care about, the stuff that doesn't require exotic refrigeration to work. Instead, it's a story about how superconductivity can be used as a test of some of the weirder consequences of quantum mechanics, one that involves non-existent particles of light that still act as if they exist.
Emerging portable testing methods include X-ray fluorescence analysers for turmeric and handheld DNA kits to test olive oil.
SAVE $600: As of Feb. 27, the Ecovacs Deebot X9 Pro Omni is on sale for $699 at Amazon. That's a 46% discount on the list price.