![](https://i.ytimg.com/vi/DqhXsEgLMJ0/mqdefault.jpg)
21:29
Are solid objects really “solid”?
![](https://i.ytimg.com/vi/nAJN1CrJsVE/mqdefault.jpg)
21:34
The Final Barrier to (Nearly) Infinite Energy
![](https://i.ytimg.com/vi/rQIg5XeIgQ0/mqdefault.jpg)
24:26
Why does WATER change the speed of electricity?
![](https://i.ytimg.com/vi/P_fHJIYENdI/mqdefault.jpg)
24:52
The Most Useful Thing AI Has Ever Done
![](https://i.ytimg.com/vi/VCXqELB3UPg/mqdefault.jpg)
28:15
You can mix 10 marbles until they sort themselves. Why not 100?
![](https://i.ytimg.com/vi/YdOXS_9_P4U/mqdefault.jpg)
28:33
Terence Tao on how we measure the cosmos | Distance ladder part 1
![](https://i.ytimg.com/vi/EjZB81jCGj4/mqdefault.jpg)
22:59
Le paradoxe du dôme : une faille dans les lois de Newton
![](https://i.ytimg.com/vi/YMO9uUsjXaI/mqdefault.jpg)
21:43