A leaf’s geometry determines whether it falls far from its tree

An apple may not fall far from the tree, but for a leaf, it depends on its shape.

Elm or apple leaves — oval and symmetrical, with few protruding lobes — fall quickly, making them likely to end up close to the tree’s base. Adding lobes and asymmetry to leaves slows their descent, causing them to fall farther away, physicists Matthew Biviano and Kaare Jensen report May 7 in Journal of the Royal Society Interface.

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