Mathematicians defy gravity

Droplets of liquid have been shown to travel uphill, rather than sliding down as expected, when the surface they are on is vigorously shaken up and down.

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<p><a href="http://www.physorg.com/news110639363.html">Mathematicians defy gravity</a></p> <p>Droplets of liquid have been shown to travel uphill, rather than sliding down as expected, when the surface they are on is vigorously shaken up and down.</p>