Autistic adults show reduced availability of a key glutamate receptor, mGlu5, across widespread brain regions.
Category: neuroscience – Page 18
The Brain’s Best Defense Against Aging Could Be Your New Favorite Hobby
Getting older means losing things. Some are fine, like any f**ks you have left to give or your tolerance for cheap tequila. Others, like the ability to follow a conversation in a loud room, hit harder.
But scientists now think there’s a way to fight back. And it might start at a piano bench.
Researchers publishing in PLOS Biology found that older adults who have played music for decades have brains that function more like those of someone half their age, at least when it comes to understanding speech in loud environments. In brain scans, they showed cleaner, more focused activity while listening to spoken syllables buried in background noise. Their brains weren’t scrambling. They already knew what to do.
The Physicist Who Says We’ve Already Quantized Gravity
Professor John Donoghue explains why quantum physics and gravity actually work perfectly together. He tackles quadratic gravity, effective field theory, and random dynamics, arguing that grand unification and naturalness aren’t required for a theory of everything.
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- 00:00:00 — Limits of Quantum Mechanics
- 00:06:35 — Effective Field Theory
- 00:12:24 — Gravity: Geometry or Force?
- 00:18:46 — QFT and Gravity Tension
- 00:24:59 — Quadratic Gravity Theory
- 00:34:16 — Dueling Arrows of Causality
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- 00:48:13 — The Naturalness Problem
- 00:53:40 — Questioning Hidden Assumptions
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- John’s papers: https://arxiv.org/a/donoghue_j_1.html
- The Renormalization Group and Critical Phenomena [Paper]: https://www.nobelprize.org/uploads/20…
- Anthropic Considerations in Multiple-Domain Theories [Paper]: https://journals.aps.org/prl/abstract…
- Old “Ghost” Theory of Quantum Gravity Makes a Comeback [Article]: https://www.quantamagazine.org/old-gh…
- Unitarity, Stability and Loops of Unstable Ghosts [Paper]: https://arxiv.org/pdf/1908.02416
- An Effective Field Theory of Gravity for Extended Objects [Paper]: https://arxiv.org/abs/hep-th/0409156
- Not Quite a Black Hole [Paper]: https://arxiv.org/pdf/1612.04889
- On Quadratic Gravity [Paper]: https://arxiv.org/pdf/2112.01974
- Quadratic Gravity [Paper]: https://arxiv.org/pdf/1804.09944
- Renormalization of Higher Derivative Quantum Gravity [Paper]: http://www.weylmann.com/stelle.pdf
- Quantum Theory in a Nutshell [Book]: https://www.amazon.com/Quantum-Field-?tag=lifeboatfound-20…
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Crazy: Scientists Compute With Human Brain Cells
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Human brains are roughly 100,000 times more energy-efficient than current AI systems. So why don’t we build computers using human brain cells? Don’t worry, researchers are one step ahead of you there – different teams across the globe are racing to develop neuron computers; processors that integrate living brain neurons into their chips. Let’s take a look at how this technology is developing and when we might see brain cells chips in the future.
Paper 1: https://www.cell.com/neuron/fulltext/.… 2: h https://www.frontiersin.org/journals/.… 👕T-shirts, mugs, posters and more: ➜ https://sabines-store.dashery.com/ 💌 Support me on Donorbox ➜ https://donorbox.org/swtg 👉 Transcript with links to references on Patreon ➜ / sabine 📝 Transcripts and written news on Substack ➜ https://sciencewtg.substack.com/ 📩 Free weekly science newsletter ➜ https://sabinehossenfelder.com/newsle… 👂 Audio only podcast ➜ https://open.spotify.com/show/0MkNfXl… 🔗 Join this channel to get access to perks ➜
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Paper 2: h https://www.frontiersin.org/journals/.…
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💌 Support me on Donorbox ➜ https://donorbox.org/swtg.
👉 Transcript with links to references on Patreon ➜ / sabine.
📝 Transcripts and written news on Substack ➜ https://sciencewtg.substack.com/
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#science #sciencenews #tech #neuroscience
