The guys at NVIDIA did something very cool recently. They took a simple CNN (convolutional neural net) and in 2-3 days they taught it to drive a car.

Article: How Our Deep Learning Tech Taught a Car to Drive - https://blogs.nvidia.com/blog/2016/05/06/self-driving-cars-3...

These neural nets are really smart, and we don't know exactly how they work, we know only in principle. But if we asked the guy who made the self driving car what is the role of the 17th neuron in the 14th layer, he would probably have no idea. Just like human brains evolve through learning, so do neural nets. Yet many people think they are just clever tricks and not truly intelligent.