National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

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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.

A 400,000-year-old site excavated in England reveals signs of deliberate fires made using the mineral iron pyrite to produce sparks. The question of where eddies come from is immortalized in verse, ...