the hypothesis is that it's a neurological response to give better grip on wet surfaces...like treads on a tire. I thought that was pretty neat.
http://www.nature.com/news/2011/110628/full/news.2011.388.html
http://www.nature.com/news/2011/110628/full/news.2011.388.html
Last edited by HydrasBreath on 2012-04-15, 23:42; edited 1 time in total