Hear me talk about gravitational waves!

Still want more information about the LIGO gravitational wave discovery? Check me out on my local news!

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February 12, 2016

An astrophysics column on big questions and our universe.

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Theoretical astrophysicist and science writer

Monthly Issue April 2026

In this monthly issue, we examine how our understanding of energy — and how we source and use it — is evolving.

1 video 11 articles

Many facts are well-known to professionals, but are unappreciated or even rejected outright by the public. "How stars work" takes the cake.

by Ethan Siegel

Data centers consume enormous amounts of power, but their steady demand could make the grid more efficient — and lower costs for everyone.

by Ross Pomeroy

On cosmic scales, only dark matter (or something equivalent) gives us the Universe we observe. Now, the Sunyaev-Zel'dovich effect agrees.

by Ethan Siegel

As the world teeters on the brink of nuclear war, distant, advanced civilizations would never know it. Earth appears peaceful from far away.

by Ethan Siegel

Learn from the world's biggest thinkers.