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The universe is out there, waiting for you to discover it.

Our mission: to answer, scientifically, the biggest questions of all.

  • What is our universe made of?
  • How did it become the way it is today?
  • Where did everything come from?
  • What is the ultimate fate of the cosmos?

For countless generations, these were questions without resolutions. Now, for the first time in history, we have scientific answers. Starts With A Bang, written by Dr. Ethan Siegel, brings these stories — of what we know and how we know it — directly to you.

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It’s a strange idea to consider: that a tiny building block of matter, the atomic nucleus, holds the greatest potential for energy release.

And yet, it’s true; while electron transitions in atoms or molecules typically release energy on the order of ~1 electron-Volt, nuclear transitions between different configurations release energies a million times as great, on the order of ~1 Mega-electron-Volt.


All Stories

The Heart of a Science Lover

Image credit: ChronoZoom, via Why the kind of knowledge you get by asking the Universe questions about itself is the most valuable type of knowledge there is. “I’m also uncomfortable […]

Breaking the Speed of Light

Image credit: Matt Howard, Idaho National Laboratory / Argonne. It’s easier than you might think, and we’ve been doing it for over a century. “The doctors realized in retrospect that even […]

What is the Speed of Gravity?

Image credit: European Gravitational Observatory, Lionel BRET/EUROLIOS. Do changes in a gravitational field propagate instantaneously, at the speed of light, or at a different speed altogether? “The only problem with […]

Water in Space: What Happens?

Image credit: NASA / ESA, of Pedro Duque aboard the International Space Station. How one of the most interesting molecules on Earth behaves in the zero-gravity, zero-pressure environment of outer space. […]

The Stellar Story of Us

Image credit: NASA / JPL-Caltech, Hubble/Spitzer/Chandra composite; O. Krause et al. How the Universe made the elements and atoms that make up you and me, and everything else on Earth. “Things […]

Messier Monday: The Sunflower Galaxy, M63

Image credit: Doug H., via A beautiful spiral just outside the Big Dipper holds many secrets that can teach us about our own Milky Way! “If I were a flower.. […]

Weekend Diversion: Space Cats!

Image credit: Space Cats on twitter; The internet is really, really great… for cats. In space. “There are two means of refuge from the miseries of life: music and cats.”-Albert […]

All the Universe in one year

Image credit: NASA / CXC / M. Weiss. What the entire natural history of everything would look like compressed down into a single calendar year. “[D]on’t forget to make some art — write […]