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When Christian Agrillo runs number-related experiments in his lab, cheap jordans , he wishes his undergraduate subjects good luck. For certain tests, that’s about all he says. Giving instructions to the people would be unfair to the fish. Agrillo, of the University of Padua in Italy, cheap Authentic jordans , is finishing up several years of pitting humans against fish in trials of their abilities to compare quantities. He can’t, of course, tell his angelfish or his guppies to choose, say, the larger array of dots. So in recent tests he made the bemused students use trial and error too. “At the end, http://cheapjordansstock.com , they start laughing when they find they are compared with fish, cheap jordans online ,” he says. Yet the fish versus humans face-offs are eye-opening comparisons in his search for the deep evolutionary basis of what has blossomed into human mathematics. If it turns out that fish and people share some idiosyncrasies of their number sense (like spidey sense, except focused on quantities rather than danger), those elements might in theory date from a common ancestor more than 400 million years old. Comparisons of animals’ mental powers are “the paleontology of cognition,” Agrillo says. No one seriously argues that animals other than people have some kind of symbolic numeral system, cheap jordans for sale , but nonhuman animals?—?a lot of them?—?can manage almost-math without numbers. “There’s been an explosion of studies, cheap jordan shoes ,” Agrillo says. Reports of a quantity-related ability come from chickens, horses, cheap jordans free shipping , dogs, cheap air jordans , honeybees, spiders, http://highthabu-espor...rum_topic&topic=12810 http://www.frbiz.com/p...7/ipad_cover_cgi_005.html http://www.garteninsel...ion=com_content&id=56 |