The Elephant in the Universe: 100-year search for dark matter Author: Govert Schilling New Puzzles, Speculative Theories, and the Future of the Hunt
The John Batchelor Show
John Batchelor
4.5 • 2.8K Ratings
🗓️ 7 September 2025
⏱️ 11 minutes
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Summary
New Puzzles, Speculative Theories, and the Future of the Hunt
Headline: Dark Crisis Deepens with Anomalous Galaxies and Emergent Gravity Theories
The search for dark matter faces new challenges, such as the discovery of dwarf galaxies (e.g., DF44, the Dragonfly Galaxy) that appear to lack dark matter, posing a problem for both standard dark matter theory and MOND. With direct WIMP detection still elusive, physicists explore highly speculative theories: primordial black holes (black holes born in the Big Bang), fuzzy dark matter, or decaying dark matter, though these lack observational evidence. Theoreticians like Erik Verlinde propose "emergent gravity," suggesting gravity is not fundamental but arises from a deeper reality, which could imply dark matter doesn't exist at all. The ongoing search involves particle physics, underground experiments, powerful telescopes like the future Extremely Large Telescope, and the International Space Station's AMS experiment looking for antimatter signals, as scientists continue to refine theories and devise new ways to observe the unseen
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| 0:29.4 | I'm John Batchel with Govert Schilling. His wonderful new book, The Elephant in the Universe, |
| 0:35.9 | is the frontier of thinking about dark matter, dark energy, and our universe. 100-year search. |
| 0:38.9 | Right now, however, the searching the heavens, |
| 0:40.3 | are searching particle physics. |
| 0:42.3 | They're in minds waiting for collisions. |
| 0:45.8 | And we come to, uh-oh, an exception. |
| 0:49.8 | They found a galaxy without cold, dark matter. |
| 0:51.8 | They found several of them, in fact. |
| 0:54.3 | And that worries everybody. Or the quote, D.F44, that fact, and that worries everybody. |
| 0:58.6 | Or the quote, D.F44, that's the name of the galaxy. |
| 1:00.1 | They call it the dragonfly galaxy. |
| 1:01.9 | Is it a problem for everybody? |
| 1:03.5 | Is it a problem for Mun, too? |
... |
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