
20150715: 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 ...


20150702: 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.


20150422: Are Space and Time An Illusion?
 04:33: Instead, it's a four dimensional nonEuclidean mathematical space that's just there.
 04:42: That 4D mathematical space is spacetime.
