Cosmology and quantum physics both offer tantalizing possibilities that we inhabit just one reality among many. But testing ...

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 ...

In a remote stretch of New Mexico desert, a geometric monument and a cluster of otherworldly rock formations have been recast ...

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 ...