Roughly one-in-five U.S. teens say they are on TikTok and YouTube almost constantly. At the same time, 64% of teens say they use chatbots, including about three-in-ten who do so daily. Fresh data ...

The question of where eddies come from is immortalized in verse, and an earwig emerges remarkably unscathed from inside a vacuum tube, in this week’s peek at Nature’s archive.

Heat-producing elements like uranium and thorium are depleted in the lower crust. The geochemistry of crustal rocks suggests ultrahigh melting temperatures are needed to produce this depletion and may ...

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