3 mysteries of the universe — and a new force that might explain them | Alex Keshavarzi
TED Talks Daily
TED
4.1 • 11.9K Ratings
🗓️ 11 March 2024
⏱️ 12 minutes
🧾️ Download transcript
Summary
We're still in the dark about what 95 percent of our universe is made of — and the standard model for understanding particle physics has hit a limit. What's the next step forward? Particle physicist Alex Keshavarzi digs into the first results of the Muon g-2 experiment at Fermilab in Chicago, which found compelling evidence of new particles or forces existing in our universe — a finding that could act as a window into the subatomic world and deepen our understanding of the fabric of reality.
Transcript
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| 0:00.0 | Ted Audio Collective. |
| 0:02.0 | Audio Collective. |
| 0:04.0 | It's Ted Talks Daily. |
| 0:10.0 | I'm your host, Elise Hugh. |
| 0:12.0 | Why is the universe the way it is? Talk Daily, I'm your host, Elise Hugh. |
| 0:12.6 | Why is the universe the way it is, and what is it made of? |
| 0:16.5 | It turns out we only know about 5% of what the universe is composed of and the standard model for |
| 0:23.2 | understanding particle physics has hit a limit. |
| 0:26.6 | It doesn't help us understand the three big mysteries facing |
| 0:29.6 | scientists about where we live. |
| 0:33.0 | Now there's a new tool to explain the mysteries. |
| 0:35.0 | They're called mouons, and you're about to learn more about them |
| 0:38.0 | and how they work from particle physicist Alex Keshavarsi |
| 0:42.0 | in a talk recorded at TEDx Manchester 2023. |
| 0:47.8 | So today I'm really here to talk you all about one thing. |
| 0:56.7 | The universe. In the world of particle physics, the ultimate goal is to be able to describe all the particles and forces that make up our universe. And while we've made an extraordinary amount of progress |
| 1:04.4 | in this over the past hundred years, we're doing it still because there are big |
| 1:08.4 | mysteries about what the universe is made of and how we came to be here. So let me start by introducing you to three |
| 1:16.5 | of the big mysteries about our universe. First, we know that the universe is expanding. |
| 1:25.0 | So astrophysical evidence suggests that the universe started as a very dense, |
| 1:30.0 | very hot big bang, and has since been expanding outwards from that point. |
| 1:35.0 | However, as a complete shock in the late 19s, physicists discovered |
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