Cosmologists are increasingly entertaining a radical possibility: that the cosmos might fold back on itself so that, on the largest scales, space behaves like a vast mirror maze. Instead of stretching ...

"I think it's natural to take a break and wonder whether we are fundamentally thinking about this in the wrong way." When you purchase through links on our site, we may earn an affiliate commission.

Cosmologists are finally beginning to sketch a coherent picture of the universe we cannot see, using exquisitely detailed maps of galaxies, ghostly light and the large scale structure of space itself.