GW170817 Limits the Number of Spacetime Dimensions

PBS Space Time · Explainer · 16 min · 2018 · YouTube title: How to Detect Extra Dimensions

Why it's here

HN points to it as a clear explanation of the evidence that gravity does not propagate into extra dimensions.

What it covers

A PBS Space Time episode on how gravitational wave observations of a neutron star merger, GW170817, can limit the number of spacetime dimensions. It is based on a 2018 paper.