We all develop pruney fingers when we stay in the water for long time. For long time we have been told that our finger skin absorbs water and becomes like that.

Mark Changizi, an evolutionary neurobiologist at 2AI Labs in Boise, Idaho, and his colleagues goes against it.

Changizi thinks that the wrinkles act like treads on tyres, which create channels to allow water to drain away as we press our fingertips on to wet surfaces. This also allows the fingers to have greater contact with the wet surface, hence giving us a better grip.

Full story at http://www.nature.com/news/2011/110628/full/news.2011.388.html


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