Stephen Wolfram Q&A, For Kids (and others) [September 18, 2020]

Stephen Wolfram answers general questions from his viewers about science and technology as part of an unscripted livestream series. Questions include: Can data be sent via light wirelessly? - How can there be different types of twilights and would you observe the same thing on Mars? - Why is the sky not black? - How do I become a scientist like you? How did you make it to create a business out of it? - Is it possible to do a PhD research under your supervision? - Can photons interact? I heard about light-by-light scattering; but aren't photons just the (independent) quantum activation of an electro-magnetic wave? - My supervisor says that I should do little progresses and publish lots even if shallow works, but I am more inclined to fewer deeper works. What should I do? - Is there a hard lesson you learnt that has impacted you deeply? See the full Q&A video playlist: https://wolfr.am/youtube-sw-qa