The universe may actually be curved, like a giant inflated balloon, a new study claims. A study published on Monday in the journal Nature Astronomy examines data from the cosmic microwave background ...

Everything we think we know about the shape of the universe could be wrong. Instead of being flat like a bedsheet, our universe may be curved, like a massive, inflated balloon, according to a new ...

Imagine jetting out into the universe. You sail past Mars, Neptune, and Pluto, far out past the milky way and into the frothy nothingness of space. What might you find if you travelled far enough?

If you were inside a spaceship traveling in a straight line out of our solar system, where would you end up? Would you keep getting farther from home, or would you slowly loop around and end up where ...

In a hypertorus model of the Universe, motion in a straight line will return you to your original location, even in an uncurved (flat) spacetime. This multiply connected topology might be able to be ...

How did the universe start? Did we begin with a big bang, or was there a bounce? Might the cosmos evolve in a cycle of expansion and collapse, over and over for all eternity? Now, in two papers, ...

Cosmologists call this idea the “closed universe.” It’s been around for a while, but it doesn’t fit with existing theories of how the universe works. So it’s been largely rejected in favor of a “flat ...