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2015-07-15: Can You Trust Your Eyes in Spacetime?

  • 06:57: ... the physical world as geometric objects and relations in a tenseless mathematical space, we can discover facts about physics just by exploring geometry in that ...

2015-07-02: Can a Circle Be a Straight Line?

  • 01:33: ... on what we really mean by straight line and by flat verses curved mathematical spaces. ...
  • 08:07: In the meantime, you can put your questions about geodesics and curved mathematical spaces down in the comments below.

2015-04-22: Are Space and Time An Illusion?

  • 04:33: Instead, it's a four dimensional non-Euclidean mathematical space that's just there.
  • 04:42: That 4D mathematical space is spacetime.
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