What Would Early Man Sound Like?

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Researchers at the University of Amsterdam in the Netherlands created air sacs from plastic tubes to figure out how early man might have sounded: All primates have an air sac except humans, in whom it has shrunk to a vestigial organ. Palaeontologists can date when our ancestors lost the organ, as the tissue attaches to […]

Strange Water Physics

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When a droplet impacts a pool at low speed, a layer of air trapped beneath the droplet can often prevent it from immediately coalescing into the pool. As that air layer drains away, surface tension pulls some of the droplet’s mass into the pool while a smaller droplet is ejected. When it bounces off the […]