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Flocks of starlings ride the wave to escape

Why does it seem as if a dark band ripples through a flock of European starlings that are steering clear of a falcon or a hawk? It all lies in the birds' ability to quickly and repeatedly dip to one side to avoid being attacked. ...

dateMar 26, 2015 in Plants & Animals
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Hydrodynamics approaches to granular matter

Sand, rocks, grains, salt or sugar are what physicists call granular media. A better understanding of granular media is important - particularly when mixed with water and air, as it forms the foundations of houses and off-shore ...

dateMar 26, 2015 in General Physics
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