Some particles are able to flow up small waterfalls, physicists show

(PhysOrg.com) — In a paper published on arXiv, Cuban physicist Ernesto Althsuler and his team at the University of Havana, describe how they set out to reproduce a phenomenon they had observed while brewing the Argentinean drink mate, a type of tea. Althsuler noticed that after causing hot water to drop from one vessel down a very slight waterfall into another containing tea leaves, some of the leaf particulates managed to make their way back up the waterfall and into the hot water vessel.

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Some particles are able to flow up small waterfalls, physicists show