Extra dimensional theories are sometimes considered science fiction with equations. I think that's a wrong attitude. I think extra dimensions are with us, they are with us to stay, and they entered physics a long time ago. They are not going to go away.
-Leonard Susskind
Select a background
![Awesome background image](/backgrounds/default/13.png)
![Awesome background image](/backgrounds/default/4.png)
![Awesome background image](/backgrounds/default/15.png)
![Awesome background image](/backgrounds/default/1-375.png)
![Awesome background image](/backgrounds/default/2.png)
![Awesome background image](/backgrounds/default/24.png)
![Awesome background image](/backgrounds/default/9.png)
![Awesome background image](/backgrounds/default/1.png)
![Awesome background image](/backgrounds/default/23.png)
![Awesome background image](/backgrounds/default/6.png)
![Awesome background image](/backgrounds/default/18.png)
![Awesome background image](/backgrounds/default/17.png)
![Awesome background image](/backgrounds/default/14.png)
![Awesome background image](/backgrounds/default/3.png)
![Awesome background image](/backgrounds/default/19.png)
![Awesome background image](/backgrounds/default/4.jpg)
![Awesome background image](/backgrounds/default/12.png)
![Awesome background image](/backgrounds/default/22.png)
![Awesome background image](/backgrounds/default/7.png)
![Awesome background image](/backgrounds/default/1-400.png)
![Awesome background image](/backgrounds/default/8.png)
![Awesome background image](/backgrounds/default/21.png)
![Awesome background image](/backgrounds/default/25.png)
![Awesome background image](/backgrounds/default/16.png)
![Awesome background image](/backgrounds/default/1-275.png)
![Awesome background image](/backgrounds/default/11.png)
![Awesome background image](/backgrounds/default/5.png)
![Awesome background image](/backgrounds/default/20.png)
![Awesome background image](/backgrounds/default/10.png)
More quotes by Leonard Susskind
Popular Authors
A curated listing of popular authors.