Does Space Curve Back Around On Itself?

The cosmos are vast, seemingly going on forever in every direction away from oneself. The same was once true, though, of the vast sphere of Earth.

Eventually, as our means of navigation improved, we discovered that if you go any direction on the surface of Earth from a starting point, and can maintain a straight line course, you will come back to where you started.

What if the universe is like this, as well? Could it be? And, if it were, given its vastness, could we ever really know?

The following Forbes article takes the form of an intriguing Thought Experiment asking exactly these questions, and offering some of the best answers we have in an area of inquiry for which we in fact have very few.

#BlindMeWithScience #Cosmology #SpaceTime