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 ...

If you could take an apple and break it into smaller and smaller parts, you would find molecules, then atoms, followed by ...

Doron Zeilberger is a mathematician who believes that all things come to an end. That just as we are limited beings, so too does nature have boundaries — and therefore so do numbers. Look out the ...

Is the universe infinite? It's one of the most profound questions we can ask, and here's the short answer: We don't know. While we have learned a great deal about the universe, a portion of the cosmos ...

Inside some very special black holes, there may be a boundary called a Cauchy horizon. Columnist Leah Crane explores the ...

Confronting our smallness in the universe can be unsettling, but mortality may be the very thing that gives our choices, our ...

Scientists know our universe is expanding. Now they have a better idea how fast. Cosmologists who study the universe know it began with the big bang and has been expanding from a single point ever ...

Assumptions that physicists have made about the universe for over a century may be about to be overturned. Evidence is emerging that it is far lumpier than we had thought – a finding that could solve ...

The conclusion of DESI's first survey marks an important milestone for cosmology, which finds itself in a bind for the best reasons. Reading time 5 minutes Last week, the Dark Energy Spectroscopy ...

"General relativity is likely incomplete for describing the very first moments of the universe, when quantum effects should also matter." When you purchase through links on our site, we may earn an ...

David H. DeVorkin is emeritus senior curator in the history of astronomy and the space sciences at the National Air and Space Museum, Smithsonian Institution, Washington DC. What is the Universe?

“The Big Bang Theory” spinoff series, “Stuart Fails to Save the Universe,” will be available to stream on HBO Max, beginning in July. The show stars “Big Bang Theory” alums Kevin Sussman, Lauren ...