In June 2012, a Google supercomputer made an artificial-intelligence breakthrough: It learned that the internet loves cats. But here’s the remarkable part: It had never been told what a cat looks like. Researchers working on the Google Brain project in the company’s X lab fed 10 million random, unlabeled images from YouTube into their massive network and instructed it to recognize the basic elements of a picture and how they fit together. Left to their own devices, the Brain’s 16,000 central processing units noticed that a lot of the images shared similar characteristics that it eventually recognized as a “cat.” While the Brain’s self-taught knack for kitty spotting was nowhere as good as a human’s, it was nonetheless a major advance in the exploding field of deep learning.
[Source: motherjones.com, Sep/Oct 2014]