Artificial intelligence is already everywhere, and its influence is growing. It can be hard to get your head around exactly what AI does and how it can be deployed though, which is why we present to you these five fun online experiments--all you need is a web browser and a few minutes to see some of the party tricks AI is already capable of. Be wary of loading this one up unless you've got a bit of time to spare today, because it can be particularly addictive: The idea is to remove blocks from a wall by typing out definitions that Google's AI can recognize. Using machine learning algorithms, Google engineers have trained Semantris on billions of lines of sample dialog. By picking up associations between words, that should give the engine enough training to spot which word in the wall you're trying to define--though it can come up with some unexpected guesses.