(via Sabine Hossenfelder) Is the universe really infinite? Or could it close back on itself like a sphere? If it’s infinite, how can it expand? And is it true that there might be copies of you in it?

The size of the universe depends on its shape, with possibilities ranging from finite and spherical to flat or even infinite.

For centuries, humanity has pondered the ultimate fate of the universe. From theories of infinite expansion to the concept of ...

Modern cosmology reveals a universe expanding uniformly without a spatial center or edge. The Big Bang wasn't a localized explosion but a simultaneous ...

This NASA/ESA Hubble Space Telescope image features the spiral galaxy Messier 77, also known as the Squid Galaxy. CREDIT: ESA/Hubble & NASA, L. C. Ho, D. Thilker. Get the Popular Science daily ...

I don’t think the universe is infinite, but instead is in the form of the “surface” of a four-dimensional Euclidean hypersphere, so is finite. Nor do I think our universe is the only one: there may be ...

Ok, the argument has always been whether the universe goes on forever geographically and more importantly to many when did it begin to exist?<BR><BR>If it sprang into existence then what existed ...

The old adage goes that if you give an infinite number of monkeys an infinite amount of time hitting random keys on a typewriter, one of them will eventually type out the complete works of William ...

Whenever we look out at the Universe, no matter how powerful our tools or how clever our techniques, there’s always a limit to what we’re capable of observing. No photons, or quanta of light, can be ...

Is the universe infinite? Space and time are assumed to have begun at the big bang. So, if our universe is expanding, it would need infinite time to become infinite in extent. Yet current theory ...