Where did language come from? Is it possible to know without traveling back in time? And how do babies learn to speak? In this episode we have the answers to those questions and we'll hear how the word "silly" has evolved over the last several hundred years. Plus: A brand new Moment of Um answers the question, "Why is blood red if it looks blue in your veins?" And you'll hear the latest group to be added to the Brains Honor Roll!