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In this week's questions show, I explain what would happen if scientists discovered an existential threat to humanity. Would they let us know, or keep it secret to avoid a panic? Could we detect a Breakthrough Starshot fleet coming our way? And how well does China communicate its space exploration to the public? 00:00 Start 00:37 Would they tell us about the end of the world? 03:05 Is the Solar System normal? 05:38 Could we detect Breakthrough Starshots? 08:46 How well does China communicate to the public? 11:15 Could we use space junk for 3D printing? 14:02 What do I suggest for aspiring astrophysicists? 17:11 Will there ever be another Grand Tour? 19:47 What determines a planet's orbit? 22:08 Will Blue Origin pick up the pace? 25:02 What if aliens were pure energy? 28:14 Should there be more dark matter inside planets? 29:39 Would alien life be multicellular? Want to be part of the questions show? Ask a short question on any video on my channel. I gather a bunch up each week and answer them here. ???? OUR WEBSITE: ════════════════════════════════════ https://www.universetoday.com/ ???? PODCAST LINKS: ════════════════════════════════════ RSS: https://universetoday.com/audio iTunes: https://universetoday.com/itunes Spotify: https://universetoday.com/spotify ???? EMAIL NEWSLETTER: ════════════════════════════════════ Read by 50,000 people every Friday. Written by Fraser. No ads. Subscribe Free: https://universetoday.com/newsletter ???? OTHER PODCASTS: ════════════════════════════════════ Weekly Space Hangout: Weekly news roundup with Fraser, special guests, and other space journalists. RSS: https://www.universetoday.com/feed/wshaudio/ iTunes: https://podcasts.apple.com/ca/podcast/weekly-space-hangout-audio/id836926769 YouTube: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: Award-winning, long-running deep dive into space and astronomy with Fraser and Dr. Pamela Gay. RSS: https://astronomycast.libsyn.com/rss/ iTunes: https://podcasts.apple.com/ca/podcast/astronomy-cast/id191636169?mt=2 YouTube: https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg ???? JOIN OUR COMMUNITY: ════════════════════════════════════ Patreon: https://patreon.com/universetoday ???? OTHER SOCIAL MEDIA: ════════════════════════════════════ Twitter: https://twitter.com/fcain Twitter: https://twitter.com/universetoday Facebook: https://facebook.com/universetoday Instagram: https://instagram.com/universetoday Twitch: https://twitch.tv/fcain ???? CONTACT FRASER: ════════════════════════════════════ Email: frasercain@gmail.com ???? LICENSE: ════════════════════════════════════ Creative Commons Attribution 4.0 International (CC BY 4.0) You are free to use my work for any purpose you like, just mention me as the source and link back to this video.