What if there are other universes, just like ours? With an infinite number of Earths? With uncountable versions of you? And what if we don’t have to look too far to find them? Maybe a mirror version ...

There is quite a bit of time and effort in science fiction spent on parallel universes and the multiverse. We can debate whether they exist. However, as someone interested in politics, I wondered what ...

The curious minds at What If investigate what would happen if we opened a portal to a parallel universe, exploring alternate physics, realities, and cosmic consequences.

The surface of Earth is finite. We can measure it. If it was expanding, then its size would grow with time. And once again, good ol' Earth helps us understand what the universe might be doing beyond ...