The Big Bang may not have been the beginning ... density fluctuations that occurred during the universe's last contraction phase, not long before the period of expansion that we observe now.

Is our Universe really the only one? A new theory that hopes to solve one of the biggest problems in physics, may have rewritten our perception of time, and found a way through the Big Bang.

These theories aim to address questions the Big Bang does not fully resolve, keeping the debate about the universe’s origins alive and dynamic. Related: What happened before the Big Bang?

Some astrophysicists believe that the universe existed before the big bang, but if you reject that hypothesis, go ahead and ...

In the Ophiuchus galaxy cluster, astronomers spotted the largest explosion in the universe consisting of energy equal to a ...

Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of what the universe looked like in the moments before it rapidly changed ...

Early data of “little red dots,” or LRDs, from the James Webb Space Telescope (JWST) appeared to suggest the presence of galaxies too massive to exist in our modern cosmological models.

Young supernovas could have spread water out into the cosmos, causing planet formations earlier than originally thought.

It’s past time the Marvel icon Galactus got the movie adaptation he deserves, and it looks like The Fantastic Four: First Steps might finally pull it off.