Stephen Wolfram Q&A, For Kids (and others) [June 18 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: Hi Stephen, Why does the universe exist? In a recent interview you said that you have been considering this over the past month - When was the last time you weren't the smartest person in the room? - If all knowledge about physics was be lost, which theory would be most difficult to rediscover in your opinion and why? - Wolfram alpha uses a curated knowledge graph? rather than some Wikipedia crowdsourced approach, you had a bunch of people in an office authoring a lot of data for it? or does it draw from other databases? - Kids and teenagers are less and less interested by mathematics, what do you think is the reason of this? How would you change it?