Back to Show
PBS Space Time
Can a Circle Be a Straight Line?
Season 1
Episode 20
On this week's episode of Spacetime, Gabe talks about what it actually means for a line to be straight so we can better understand what we mean by the idea of "curved Spacetime". This is Part One of our series on General relativity, so be sure to check it out!
Support Provided By

19:01
How to build a particle collider the size of the solar system.

12:39
One of the most important reasons we go to space is to know our own planet better.

17:14
Can something that exists be bad science?

18:56
It may be that our very DNA inherited its twist from the underlying handedness of reality.

17:21
Did God have any choice in creating the world? So asked Albert Einstein

18:19
What if, just before we reach the bottom, we find out that reductionism fails?

19:03
The biggest news in cosmology in recent years is that dark energy may be fading away.

18:50
Does this also explain why there are no aliens?

16:58
Quantum energy teleportation may be as close as we get to transporter beams. But how close is that?

14:50
Why is there any matter in the universe? A new antimatter breakthrough at LHC holds clues.

16:30
There’s an extremely good chance that Earth once did have a ring system.

17:23
How is it possible to tell if a space rock will one day collide with the Earth?