Part two of Grant Sanderson's video with Terry Tao on the cosmic distance ladder

The corrections in his blog post show you the level of precision mathematicians are used to.

A regular interviewer would have left the inaccuracies as they are because it’s too tedious to go over all of them when you have a casual conversation.

This was very entertaining. I had a rough idea of the timeline before, but had never thought about it in this way (that is, a ladder).