The faintest sound a young, healthy ear can detect moves the eardrum by less than…
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Every patch of human skin the size of a pencil eraser carries roughly a million bacteria, and NASA now warns those microbes vent from spacesuits and could survive in the shaded craters near the Moon’s South Pole for days after the astronauts leave
A patch of human skin the size of a pencil eraser carries roughly a million…
