What Is A.I. and Machine Learning?

You read about it constantly. It seems like everyone's doing it, but does anyone actually know what it is? Today, you can't go more than a day without hearing about artificial intelligence (A.I.) or machine learning (ML), but these concepts have actually been around for a long time. New advancements in computing power and algorithms have brought about a recent resurgence in the field, though. Now, it seems as if everyone thinks A.I. will change the world.