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In June Scientific American launched its Great Consciousness Contest intended to get readers involved in testing an idea put forward by leading neuroscientists Christof Koch and Giulio Tononi.

In June Scientific American launched its Great Consciousness Contest intended to get readers involved in testing an idea put forward by leading neuroscientists Christof Koch and Giulio Tononi. Their article in SA 's June issue, " A Test for Consciousness ," postulates that slight variations in the placement of objects that occupy ordinary everyday images can completely befuddle the most sophisticated image-recognition capabilities of today's computers.

A look at the companies competing to be top of the class in the digital textbooks market College tuition continues to rise, but textbooks may be getting cheaper—and a lot more portable. Instead of lugging a backpack filled with heavy volumes, some students have begun using electronic textbooks, which typically cost less and can be read on a laptop or tablet