astrobiology

Sara Walker, an astrobiologist and theoretical physicist, discusses the physics of life, time, complexity, and aliens. She is the author of "Life as No One Knows It: The Physics of Life’s Emergence."

Nathalie Cabrol, an astrobiologist at the SETI Institute, joins Lex Fridman to discuss the search for alien life. She directs the Carl Sagan Center for the Study of Life in the Universe.