K2-18b: From contested biosignatures to Hycean prospects and null SETI results guiding future exoplanet surveys

To the point

Anton introduced K2-18b as a water-rich world once tied to a possible life signal, but JWST observations found methane and CO2 with no ammonia, Gabriella Digennaro showed the signal could form abiotically, Ciardi Tremblay’s SETI team found no technosignatures and set limits on transmissions, and Daniel Angerhausen notes that null results still refine our search strategy, guiding future SKA surveys while K2-18b remains an intriguing target for studying distant oceans.

Comulytic Note Pro AI Voice Recorder, Unlimited Transcribe & Summarize

After the Flying Saucers Came: A Global History of the UFO Phenomenon

Greg Eghigian

In Plain Sight: An investigation into UFOs and impossible science

Ross Coulthart

Passport to Magonia: From Folklore to Flying Saucers

Jacques Vallee

Our recommendations from Amazon

youtu.be

Aliens or Nah? SETI Investigates Planet K-18b (and Other Updates)

Support this channel on Patreon to help me make this a full time job: https://www.patreon.com/whatdamath (Unreleased videos, extra footage, DMs, no ads) Alternatively, PayPal donations can be sent here: http://paypal.me/whatdamath Get a Wonderful Person Tee: https://teespring.com/stores/whatdamath More cool designs are on Amazon: https://amzn.to/3QFIrFX Hello and welcome! My name is Anton and in this video, we will talk about K2-18b updates - DMS, aliens or nah? Links: https://arxiv.org/pdf/2602.09553 https://arxiv.org/abs/2504.16236 https://arxiv.org/abs/2505.13407 https://iopscience.iop.org/article/10.3847/2041-8213/ad74da/pdf https://www.phys.ethz.ch/news-and-events/d-phys-news/2025/04/in-the-search-for-life-on-exoplanets-finding-nothing-is-something-too.html Hycean planets: https://youtu.be/ceXENiS--_8 Previous update: https://youtu.be/IzgZRCQHyt0 #dms #k218b #aliens 0:00 k2-18b exoplanet updates 1:00 What this planet is probably like 2:30 Exciting discovery of DMS 3:30 Counterevidence 5:15 SETI observations 6:50 Challenges 7:55 How this was done (methodology) 8:35 Results - sorry, no aliens 9:25 Important proof of concept and implications 11:05 Conclusions Enjoy and please subscribe Bitcoin/Ethereum to spare? Donate them here to help this channel grow! bc1qnkl3nk0zt7w0xzrgur9pnkcduj7a3xxllcn7d4 or ETH: 0x60f088B10b03115405d313f964BeA93eF0Bd3DbF The hardware used to record these videos: New Camera: https://amzn.to/4pCVINS CPU: https://amzn.to/4qXIaxC Video Card: https://amzn.to/2M1W26C Motherboard: https://amzn.to/2JYGiQQ RAM: https://amzn.to/2Mwy2t4 PSU: https://amzn.to/2LZcrIH Case: https://amzn.to/2MwJZz4 Microphone: https://amzn.to/2t5jTv0 Mixer: https://amzn.to/2JOL0oF Recording and Editing: https://amzn.to/2LX6uvU Some of the above are affiliate links, meaning I would get a (very small) percentage of the price paid. Thank you to all Patreon supporters of this channel Special thanks also goes to all the wonderful supporters of the channel through YouTube Memberships Credit: Mark Garlick www.markgarlick.com Licenses used: https://creativecommons.org/licenses/by/4.0/ and relevant Creative Commons licenses