Stephen Sekula

Stephen Sekula at

From DanHooperAstro on Twitter: My new book, "At the Edge of Time: Exploring Our Universe's First Seconds", coming in November. Pre-order on amazon now: https://www.amazon.com/Edge-Time-Exploring-Mysteries-Essentials/dp/0691183562 https://twitter.com/DanHooperAstro/status/1156987581105676288/photo/1