Ethan Siegel

Astrophysicist / Science Communicator
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Ethan Siegel is an American theoretical astrophysicist and science writer, who studies Big Bang theory.

Ethan was born in New York, majored in three different things as an undergrad, and got his Ph.D. in theoretical physics. After postdoctoral research focusing on dark matter and cosmic structure formation and a number of teaching stints, he became a physics professor at Lewis & Clark College and a professional science communicator.

His blog, Starts With a Bang, is currently hosted on Forbes, and was voted the #1 science blog on the internet by the Institute of Physics, Real Clear Science, and won the People's Choice Award from

His first two books, Beyond The Galaxy and Treknology, are available wherever books are sold.


Ethan regularly appears on television and radio spots, teaching the world about the latest news and discoveries in science. Now focusing on writing and speaking full-time, his work has appeared in Discovery, Scientific American, the Wall Street Journal, Esquire,, and NASA's The Space Place.