This episode is part of a sponsored content series with the Houston Museum of Natural Science. Hear more stories here.

Dr. Carolyn Sumners, curator of Astronomy, joins The Houston Museum of Natural Science interns in pondering the Big Questions: What things had to go right for Earth to be able to sustain life as we know it? Is our “example of one” all we’ll ever know? Or are aliens already walking among us? And, if invited, would you board an alien spacecraft?