"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners ...

A new study suggests that the explosive deaths of the universe's earliest stars created surprising quantities of water that ...

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 ...

When the smaller stars died, they exploded as typical supernovae ... Whether life actually did appear in the universe so early is an unanswered question. There is also the fact that while water ...

Supernovas in the early universe just hit different. Especially when the stars that exploded was a stellar monster 20 times the mass of the sun. This supernova, detected as part of the JWST ...

Here’s how it works. When the cosmos' first stars exploded in spectacular supernovas, they may have unleashed enormous amounts of water that flooded the early universe — and potentially made ...