Shrimpy Sea Life May Mix Oceans as Much as Tides and Winds Do

Here's a puzzle: A child pees in the shallow end of a pool and then swims to the deep end. Which end should you avoid? Conventional wisdom holds that the deep end would be safe (until the pool's normal circulation mixed the contaminated water throughout). But according to new research--and old observations by Charles Darwin, the grandson of the more famous Charles Darwin--it would be wise to avoid most of the child's path through the water. [More]

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