Fluid Dynamics and the Potential Cost of Long Genitalia in Male Guppies

Male guppies with long genitals may swagger, physically in a current, and metaphorically in the grand scheme of reproduction. Or not. This newly published study explores these questions: “A Potential Cost of Long Genitalia in Male Guppies: the Effects of Current Speed on Reproductive Behaviour,” Lucia Kwan, Adam N. Dobkin, F. Helen Rodd, and Locke […]

Coming attraction: Disgust: The Fluid Dynamics of the Gross

Fluid dynamics will swirl, both socially and scientifically, in Portland, Oregon, in November. The annual meeting of the American Physical Society (APS) Division of Fluid Dynamics will feature a disgust-packed, juicy special session: Session L1: Focus Session – Disgust: The Fluid Dynamics of the Gross Monday, November 21, 2016, 4:30PM L1.00001: A numerical investigation of a simplified human birth […]

The Physics of Water-skipping Stones

In stone skipping, one tosses a stone with a flattened surface across water (or other fluid) to try to get it to bounce as many times as possible. (There are also military applications, but let’s stick to the fun stuff.) A few months ago, mechanical engineer Tadd Truscott and collagues wrote a quick study on […]

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