Deep Learning is the next thing

While I did write a primer on Deep Learning earlier the more we learn about Deep learning the more excited we are and there does not seem to any end to the new apps that will come up using Deep Learning. Deep Learning is a branch of Artificial intelligence that uses neural network to train data and thereby extract the data in the fastest possible manner. For Deep learning neural network is the origin. Way back in 1940's neural network architecture was discovered as someone wanted to just replicate the human brain and thought a data structure similar to neurons in the brain will help us solve AI issues. How many Neurons are there in the brain?