4:57

Another Portal Paradox

8:05

Time Travel in Fiction Rundown

24:14

The Banach–Tarski Paradox

43:08

Every Softlock in Portal

8:53

I Made Portal 3 Because Valve Wouldn't

5:30

The Moon's Orbit is WEIRD

4:05

Passing A Portal Through Itself

11:41

This is What Happens When you Desynchronize Portals