Neil deGrasse Tyson sits down with evolutionary biologist and author of The Genetic Book of the Dead Richard Dawkins to talk about evolution, whether we were “designed,” how we are living reflections of our ancestors, and much much more.

Could the universe be composed of a single electron? Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O’Reilly answer grab-bag questions about the multidimensionality of time, quantum chromodynamics, gluons, tachyons, and more with astrophysicist Charles Liu.