Contributing editors, Charles Liu, astrophysics professor at the City University of New York's College of Staten Island, and Jeffrey Lee Simons, social media director of StarTalk Radio.

Space -- Planet Earth -- Being human -- Futures imagined.

Tyson looks at the most confounding mysteries of Earth, space, and what it means to be human. He attempts to answer all of your most pressing questions, from how the brain works to the physics of comic book superheroes.