Could we actually live on Mars? - Mari Foroutan. Where does gold come from? - David Lunney. The journey to Pluto, the farthest world ever explored - Alan Stern. Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting. How fast are you moving right now? - Tucker Hiatt. The death of the universe - Renée Hlozek. Who won the space race? - Jeff Steers. The beginning of the universe, for beginners - Tom Whyntie. How small are we in the scale of the universe? - Alex Hofeldt. The moon illusion - Andrew Vanden Heuvel. What creates a total solar eclipse? - Andy Cohen. What is the universe expanding into? - Sajan Saini. Could the Earth be swallowed by a black hole? - Fabio Pacucci. Could human civilization spread across the whole galaxy? - Roey Tzezana. The life cycle of a neutron star - David Lunney. Is there a center of the universe? - Marjee Chmiel and Trevor Owens. Why is NASA sending a spacecraft to a metal world? - Linda T. Elkins-Tanton. Should we be looking for life elsewhere in the universe? - Aomawa Shields. Three ways the universe could end - Venus Keus. What is the universe made of? - Dennis Wildfogel. Sunlight is way older than you think - Sten Odenwald. Four ways to understand the Earth's age - Joshua M. Sneideman. How far would you have to go to escape gravity? - Rene Laufer. Could we survive prolonged space travel? - Lisa Nip. Would you live on the moon? - Alex Gendler. How to build a dark matter detector - Jenna Saffin. Why neutrinos matter - Sílvia Bravo Gallart. How do we study the stars? - Yuan-Sen Ting. Is space trying to kill us? - Ron Shaneyfelt. The first asteroid ever discovered - Carrie Nugent. What light can teach us about the universe - Pete Edwards. How to detect a supernova - Samantha Kuula. Could comets be the source of life on Earth? - Justin Dowd. Questioning the universe - Stephen Hawking. Can a black hole be destroyed? - Fabio Pacucci. There may be extraterrestrial life in our solar system - Augusto Carballido. The dust bunnies that built our planet - Lorin Swint Matthews. Einstein's twin paradox explained - Amber Stuver. Are we living in a simulation? - Zohreh Davoudi. Hawking's black hole paradox explained - Fabio Pacucci. NASA’s first software engineer: Margaret Hamilton - Matt Porter & Margaret Hamilton. Newton’s three-body problem explained - Fabio Pacucci. Could we harness the power of a black hole? - Fabio Pacucci. What if every satellite suddenly disappeared? - Moriba Jah. The woman who stared at the sun - Alex Gendler.