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Double comet alert! Comets Lemmon and SWAN will reach their brightest this week — here's how to spot them

Comet Lemmon (C/2025 A6) makes its closest approach to Earth on Oct. 21, about 24 hours after the fainter Comet SWAN (C/2025 ...
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Easter Island statues may have 'walked' thanks to 'pendulum dynamics' and with as few as 15 people, study finds

Simple physics may explain how the Easter Island statues could "walk" miles with only a handful of people, but the debate ...