Science & Technology Q&A for Kids (and others) [November 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: Do you think will we get anti gravity cars? - How much memory does a rock have? Do protons or photons have memory? Do orbits have memory? - When is someone considered dead? How do we define the line between alive and dead? - How does a flock of sparrows know how to all change directions simultaneously? - Do you think its more important for humanity to look to colonize another planet or try to look after the earth and make it habitable for the future? - Can we push the jet streams?