Stephen Wolfram Q&A, For Kids (and others) [March 12, 2021]

Stephen Wolfram answers general questions from his viewers about science and technology as part of an unscripted livestream series, also available on YouTube here: https://wolfr.am/youtube-sw-qa Questions include: When an electron moves from one energy level to another and it releases a photon, is the direction of the photon random? - Can you please explain inertial and non-inertial reference frames? What are their implications? - Why do humans have an appendix even though it is unnecessary? - Why do we have folds in our ears? - Save icon-Floppy discussion.