Research in general relativity and quantum field theory. Principal Research Scientist at Georgia Tech. Book The Infinite Universe (2020) on Amazon.

The Universe is: Expanding, cooling, and dark. It starts with a bang! #Cosmology Science writer, astrophysicist, science communicator & NASA columnist.

Writing about space since I was 10, still not Carl Sagan. Weekly video show, podcast, comics, more: www.thecosmiccompanion.net

Astronomer, technologist, & creative focused on using new media to engage people in learning and doing science. Opinions & typos my own.