Please join my mailing list here 👉 https://briankeating.com/list to win a meteorite 💥 Remastered from our interview in 2022.  There are few concepts in physics as frequently discussed but as poorly understood as dark matter. After all, we don’t even know what it’s made of!  However, there are many potential candidates, and I had the pleasure of explaining them in my interview with Arvin Ash. We also talked about the fascinating possibility of detecting gravitational waves from the polarization of the CMB and why it is very likely that there is, in fact, no life outside of Earth.  Tune in! Key Takeaways: 00:00:00 Intro  00:00:37 What is the CMB? 00:01:25 What is the polarization of the CMB? 00:04:49 What is the evidence for cosmic inflation?  00:05:46 What is the leading contender for dark matter? 00:11:51 There may be no other life in the universe! — Additional resources: ➡️ Check out Arvin Ash: 💻 YouTube: https://www.youtube.com/channel/UCpMcsdZf2KkAnfmxiq2MfMQ  ✖️ Twitter: https://twitter.com/arvin_ash?lang=en 📝 Get one month of Snipd Premium for free with this link: https://get.snipd.com/Cx7S/brianSnipd Snipd lets you take Smart Notes 🧠 with AI 💡 — it’s my favorite podcast player 😀 ! 📢 Ownership of your health starts with AG1. Try AG1 and get a FREE 1-year supply of Vitamin D3K2 and 5 FREE AG1 Travel Packs with your first purchase 👉 https://drinkag1.com/impossible ➡️ Follow me on your fav platforms: ✖️ Twitter: https://twitter.com/DrBrianKeating  🔔 YouTube: https://www.youtube.com/DrBrianKeating?sub_confirmation=1  📝 Join my mailing list: https://briankeating.com/list  ✍️ Check out my blog: https://briankeating.com/cosmic-musings/  🎙️ Follow my podcast: https://briankeating.com/podcast Into the Impossible with Brian Keating is a podcast dedicated to all those who want to explore the universe within and beyond the known. Make sure to subscribe so you never miss an episode! Learn more about your ad choices. Visit megaphone.fm/adchoices