Artificial neural network made out of DNA

In what is a biological breakthrough, researchers from the California Institute of Technology have constructed a test tube artificial neural network that can recognize'molecular handwriting'. The development overcomes a major problem with machine learning; that is the ability of a machine to correctly identify handwritten numbers. Artificial neural networks are computing systems based on the biological neural networks that constitute animal brains. These systems can "learn" to perform tasks by examining examples and instead of being programmed with any task-specific rules. Neural networks consist of input and output layers together with a layer made up of units that can transform the input into something that the output layer can use.