An epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the universe, others right here on Earth. Each scenario examines a scientific theory, research or fact through a hypothetical question.
How Self-Replicating AI Machines Could Destroy Earth in 48 Weeks
Could self-replicating machines controlled by an out-of-control AI destroy Earth in just 48 weeks? Explore a hypothetical scenario in which machines mine asteroids and planets, drain stars for energy, and spread across galaxies to build more of themselves.
Discover how self-replicating probes might work, why their expansion could become dangerous, and how the AI alignment problem raises questions about whether superintelligent systems would keep humanity safe.
Help prevent AI extinction risk in just 2 minutes: visit ControlAI to join over 40,000 people in contacting their representatives. You can also explore ControlAI's Action Groups to work with others in your community.
Explore more What If scenarios:📘 The What If Book: https://bit.ly/WIFBook📝 Articles: https://whatifshow.com/
Join the community💬 Discord: https://discord.gg/Bj5UnspbwE📲 WhatsApp: https://whatsapp.com/channel/0029Va8VC502ER6r1yk1yP2Y📸 Instagram: http://bit.ly/whatif-instagram🐦 Twitter/X: http://bit.ly/whatif-twitter📘 Facebook: http://bit.ly/facebook-whatif
Support What If👕 Merch: https://bit.ly/shopwhatif❤️ Join this channel for exclusive perks: https://www.youtube.com/channel/UCphTF9wHwhCt-BzIq-s4V-g/join🙏 Patreon: https://www.patreon.com/whatifshow/membership
More from Underknown🧠 Aperture – Philosophy & Psychology: https://bit.ly/aperture-show🆘 How to Survive – Survival Science: https://bit.ly/how-to-survive-show
📩 Brand partnerships & collaborations: contact@underknown.com
Produced by Underknown: https://underknown.com
#ai #artificialintelligence #whatif #science #technology #extinction #extinctionevent
00:00:00: What If AI Destroys Us by Accident?00:01:19: Building a Machine That Builds Itself00:15:19: The Case for Self-Replicating Probes and How It Goes Wrong00:23:40: From Earth to the Galaxy00:29:48: The AI Alignment Problem
#AI #artificialintelligence #WhatIf #science #technology #extinction #extinctionevent #self-replicatingmachines #self-replicatingprobes #AIalignmentproblem #AIextinctionrisk #superintelligentAI #runawayAI #spaceexploration #asteroidmining #galacticexpansion #ControlAI
See show notes: https://inlet.fm/what-if-science-theories-possibilities/episodes/6a91cd2afed5d6be5f0292e2
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27 Oct 2026
The Speed of Light: Why Your Brain Predicts the Present
Are you experiencing reality in real time? Light takes time to travel, so everything you see—from distant stars to your own hands—comes from the past. Discover how your brain predicts and adjusts to help you navigate a delayed view of reality.
Explore more What If scenarios and go deeper with the What If community.
📘 The What If Book: https://bit.ly/WIFBook📝 Articles: https://whatifshow.com/
Join the community
💬 Discord: https://discord.gg/Bj5UnspbwE📲 WhatsApp: https://whatsapp.com/channel/0029Va8VC502ER6r1yk1yP2Y📸 Instagram: http://bit.ly/whatif-instagram🐦 Twitter/X: http://bit.ly/whatif-twitter📘 Facebook: http://bit.ly/facebook-whatif
Support What If
👕 Merch: https://bit.ly/shopwhatif❤️ Join this channel for exclusive perks: https://www.youtube.com/channel/UCphTF9wHwhCt-BzIq-s4V-g/join🙏 Patreon: https://www.patreon.com/whatifshow/membership
More from Underknown
🧠 Aperture – Philosophy & Psychology: https://bit.ly/aperture-show🆘 How to Survive – Survival Science: https://bit.ly/how-to-survive-show
📩 Brand partnerships & collaborations: contact@underknown.com
Produced by Underknown: https://underknown.com
#shorts #space #science #speedoflight #cosmos #lighttraveltime #brainpredictions #visualperception #timeperception #delayedreality #distantstars
See show notes: https://inlet.fm/what-if-science-theories-possibilities/episodes/6a907b7cb5a5a1bad2c4fb50
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26 Oct 2026
What If We Replaced the Sun With the Universe’s Deadliest Objects?
What would happen if we replaced the Sun with some of the universe’s deadliest objects? Explore hypothetical solar systems, enormous cosmic objects, and the consequences of swapping our star for Betelgeuse.
Discover the true scale of the largest objects in the universe, imagine exoplanets replacing our solar system, and see how the Sun would look from every planet. Plus, explore what could happen if the Sun exploded tomorrow.
Explore more science with Popular Science, a free streaming channel featuring What If favorites alongside engineering, rocket launches, movies, space, and Earth sciences: https://underknown.com/popularscience/
Support us on Patreon: https://www.patreon.com/whatifshow/membership
Check out our other channels:How to Survive: https://bit.ly/how-to-survive-showAnimalogic: https://www.youtube.com/@UCwg6_F2hDHYrqbNSGjmar4wAperture: https://bit.ly/aperture-show
T-shirts and merch: http://bit.ly/whatifstore
Follow What If:Instagram: http://bit.ly/whatif-instagramDiscord: https://discord.gg/Bj5UnspbwEPodcast: http://bit.ly/yt-what-if-show-podcast
What If is a mini-documentary series exploring hypothetical worlds and possibilities, making complex science fun and accessible through imaginary adventures in time and space.
Contact us: https://underknown.com/contact/
#whatif #science #earth #universe
00:00:05: What if we swapped our Sun with other objects in the universe?00:19:58: The true scale of the largest objects in the universe00:32:23: What if exoplanets replaced our solar system?00:51:21: What would the Sun look like from every planet?01:13:36: What if the Sun exploded tomorrow?01:18:01: What if Betelgeuse replaced our Sun?
#whatif #science #earth #universe #Sun #solarsystem #Betelgeuse #exoplanets #largestobjectsintheuniverse #cosmicscale #astronomy #spacescience #hypotheticalsolarsystems #Sunexplosion
See show notes: https://inlet.fm/what-if-science-theories-possibilities/episodes/6a8fa88d71dc9df720c43354
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Reach and audience
Public platform figures. Ratings count people who left a rating, not total listeners.
Apple Podcasts (US)
4.8 / 5
13 ratings
Spotify
4.3 / 5
34 ratings
Podcast Authority Score: 47 / 100
A composite of feed quality, social presence, YouTube performance and engagement. Read the methodology.
Quality
95
Social presence
0
YouTube
0
Engagement
0
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