Around the Web: Groundhog Galore. Replacement Rodent. Extra Eyesight. Translation Trouble. Superfluous Sockets. Super Supercapacitors. Timeless Tomes. Pointless Product. Tesla Trouble. Coin Couture.

All about Groundhog Day. Tetrachromats have an extra photoreceptor that lets them see 100 times as many colors as the rest of us. 7-Eleven is testing touchless “floating holographic displays” for self-checkout. A mistranslated sign inadvertently advertises free alcohol. A gigantic, 60-socket power bank could fully charge 5,000 smartphones with 3,000-mAh batteries. A gallery of “automated furniture.” Enhancing the energy storage capacity of graphene supercapacitors used in solar heating. A search engine that finds full-text public-domain books. Why would anyone program a self-driving car to ignore stop signs? A chainmail cocktail dress made from pennies. All that and more in WhatTheyThink’s weekly wintry miscellany.

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