The Shape and Size of the Universe: Curvature is Key

Is the universe finite or infinite in extent? This question has been a preoccupation of philosophy for millennia, and scientists continue to grapple with it. Wherever infinity appears, paradox looms up. Given the finite speed of light, an infinite cosmos would have regions forever unknowable to us. But even a finite cosmos presents perplexities: if … Continue reading The Shape and Size of the…