On Sun, 30 Dec 2018 08:11:41 -0800 (PST), RichA
wrote:

On Sunday, December 30, 2018 at 11:05:00 AM UTC-5, Chris L Peterson wrote:
On Sun, 30 Dec 2018 06:51:31 -0800 (PST), RichA
wrote:

https://phys.org/news/2018-12-univer...dimension.html

Interesting, but I still think nk string theory prevails. If they could find a way to measure gravity bleed into the dimension, it would be a great first step.

If you don't mind the math, the pre-print is available.

They are looking at a 5th dimensional de Sitter sphere. The expanding
bubble we're in is 4-dimensional.

Are we in it, or on it?

We're on the 3D spatial surface of a 4D sphere. Time is the radial
axis.