A sexy calculator? You’ve got to be kidding. Though indisputably necessary, it’s hard even to remember a time when they existed. Today we just instinctively tap an app on our phone for some ...

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NASA’s Parker Solar Probe skimmed the sun on Christmas Eve and lived to tell the tale. The heat-hardened spacecraft made its closest solar flyby yet at 6:53 a.m. EST on December 24. It came ...