Professor Barbara Ryden has been a member of the Ohio State University faculty since 1992, Prof. Ryden studies the formation, alignment, and shapes of galaxies, and the large-scale structure of the universe, and cosmology, including tests for dark energy, dark matter, and the properties of the primordial density fluctuations. She is internationally known for her textbook Introduction to Cosmology, which won the first Chambliss Astronomical Writing Award in 2006 from the American Astronomical Society, and is now in its second edition, and she co-authored Foundations of Astrophysics with Prof. Bradley Peterson, a beginning-level text in astrophysics for astronomy majors. She is currently editor in chief of the Ohio State Astrophysics Series, a series of graduate-level textbooks now in contract with Cambridge University Press. The first two volumes will be Interstellar & Intergalactic Medium by Prof. Ryden and Prof. Richard Pogge (2021) and Stellar Structure & Evolution by Prof. Marc Pinsonneault and Prof. Ryden (2022). Please join my mailing list; just click here http://briankeating.com/mailing_list.php  Please contact [email protected] to learn more about sponsoring Into the Impossible. Learn more about your ad choices. Visit megaphone.fm/adchoices