I have watched the video of Sabine Hossenfelder about portals into other dimensions (wormholes):
Screenshot from this video:
In two-dimensional space, a portal looks like a circle, and the portal entrance looks like a circle perimeter (hope my English is ok). Accordingly, in our three-dimensional space, a portal should look like a ...
Screenshot from this video:
In two-dimensional space, a portal looks like a circle, and the portal entrance looks like a circle perimeter (hope my English is ok). Accordingly, in our three-dimensional space, a portal should look like a ...