Some exciting news last week. Google's simulation of a neural network taught itself how to identify cats after a week of watching YouTube videos. Keep in mind that the network had never been given even a single image labeled as a cat; it was never told what a cat was. It taught itself from unlabeled images.
Besides image recognition, this research will have applications in speech recognition and natural language processing. (As in Google's own version of SIRI).
As soon as the neural network believes that it is itself a cat, the feline conquest of the internet and AI will be complete!
Here's the story: http://www.eetimes.com/electronics-news/4376128/Google-neural-network-identifies-cats