Ethan R. Siegel is an American theoretical astrophysicist and science writer, who studies the Big Bang theory. In the past he has been a professor at Lewis & Clark College and a blogger at Starts With a Bang, on ScienceBlogs and also on Forbes.com since 2016.
Siegel worked at Fermilab in 1997. He received his undergraduate degree in physics, classics and integrated science from Northwestern University in June 2000. Influenced by Carl Sagan’s Cosmos, he went back into academia to study the universe. He studied theoretical cosmology, in particular cosmological perturbation theory, at graduate school at the University of Florida and received his PhD in 2006. Siegel was a teaching assistant in undergraduate general physics at the University of Wisconsin in Spring 2007 and then took up a post-doctoral research post at the University of Arizona. In 2008, Siegel moved with his then fiancée to Portland, Oregon, after deciding to not pursue an ambitious research career with long hours and instead focus on science outreach and have a “fuller, richer life”.