NEW Dark Energy Data Surprises Scientists (ft. Kyle Dawson)

Into the Impossible With Brian Keating

Brian Keating

Science, Physics, Natural Sciences

4.7 • 1.1K Ratings

🗓️ 18 June 2025

⏱️ 50 minutes

🔗️ Recording | iTunes | RSS

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Summary

Is everything we thought we knew about the universe… wrong? Lambda-CDM model nearing its breaking point? Could dark energy actually be evolving? In this episode of Into the Impossible, I’m joined by Kyle Dawson and Daniel Green to discuss the latest data from the DESI experiment. These new results are making headlines, and rightfully so, as they hold the potential to transform our understanding of the universe completely. Kyle Dawson, a key figure in the DESI project and professor at the University of Utah, explains the findings from DESI’s second data release. Together with Daniel Green from the University of California, San Diego, we dig into how fresh observations of dark energy, baryon acoustic oscillations (BAO), and cosmic expansion are revealing cracks in the standard model. We also break down the implications of these results and talk about the possible existence of negative neutrino masses—a topic that’s been gaining a lot of attention in the cosmology community. Don’t miss out! — Please join my mailing list here 👉 https://briankeating.com/list to win a meteorite 💥 — Key Takeaways: 00:00 Intro 01:09 Most surprising results of the DESI experiment 02:38 DESI’s instrumentation and data analysis 05:43 What’s lacking in the CMB? 07:17 The 4.2 sigma tension in cosmological data 10:44 Theoretical models and dark energy evolution 22:16 Neutrino mass, dark energy, and paradigm shifts 28:41 Scepticism about current cosmological models 30:22 Negative neutrino mass 40:35 Technological advancements and the future of DESI 48:15 Outro — Additional resources: ➡️ 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 follow so you never miss an episode! Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0	What I really see this is more philosophically is kind of a null test against the LAMM
0:04.9	model, the standard model we've had in place for 25 years. And it's starting to see evidence
0:08.5	that there's something wrong with that model and there's some transition, some perturbation,
0:13.4	some extra component that we need to add to the standard model.
0:16.2	He took it very hard that, you know, he worked on this study of galaxies and he would have said they should
0:22.6	have been the ones to discover it.
0:24.1	That it was like the fact that they had this thing staring them in the face and they let
0:28.0	the supernova people make the discovery.
0:30.3	It was like, well, how are we ever going to discover anything if we had this giant signal
0:33.5	that we were staring at?
0:34.4	We couldn't see it.
0:35.1	New data from Desi, the dark energy spectroscopic instrument probing our universe, revealed
0:40.6	something surprising about dark energy that has major implications for both the future of our universe
0:47.5	and our present understanding of fundamental physics.
0:50.6	Today, I'm speaking with Dr. Kyle Dawson, Professor of Physics and Astronomy at the
0:54.5	University of Utah, the past spokesperson of the DESE collaboration, and my colleague, Professor
0:59.3	Daniel Green at UCSD, to unpack these new mysterious findings. Let's go.
1:05.1	Kyle, welcome to the Into the Impossible podcast. So nice to have you here.
1:08.0	Great. Thanks, Brian. The headline, of course, is that Desi has seen
1:11.1	evolving signs of dark energy, that Einstein or good old friend, he might have been wrong. It might
1:16.7	not be a cosmological constant. It might be some variable constant. What was the most surprising
1:21.1	or interesting result in data release two of the Desi experiment? For me, the most appealing thing
	...

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