Classroom Aid - Non-Euclidean Geometry xx

[jeanpierrem]

There is a thing that I don't understand in non-euclidean geometry particularly in lobachevsky postulates. How can a line intersect another line in euclidean space and still be parallel in non euclidean space

[michaelspurlock]

David, thanks for your videoes. You explain science & math concepts, so, that people can understand and appreciate these subjects without having to attain advanced degrees.

[OmniGuy]

David, please do a series on entanglement. How do we really know they are entangled clear across the universe?

[EmergencyTemporalShift]

That last example messes with my head.

[MartinLichtblau]

Planes fly straight from their Point of View, but mapped on a flat surface like a map it seems curved.

[shadowthejudgehog]

Simply explained and easy to understand. Thankyu

[guillesvk]

I guess you have a mistake there. The map you are using for the example of the airplane has a Mercator projection, and as such every srtright line you draw on it is a great circle.