https://www.youtube.com/watch?v=MTY1Kje0yLg

It's just another look at the rubber sheet analogy, but I liked this one, especially as it introduced dark energy.

Downside? It's stirred up all those unanswered questions about gravity.

Is it a force, or not?

Does mass expend energy in warping spacetime, and maintaining the curvature?

Etc, etc......


There never was nothing.