What happens to gravity when matter converts to energy? Neil deGrasse Tyson and co-host Paul Mecurio dive into fan questions about the speed of light, time machine mistakes, and what Neil would do if he were an alien.

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Is there life on other planets? On this episode of StarTalk, Neil deGrasse Tyson and co-host Matt Kirshen dig into the search for extraterrestrial life with exoplanet expert and author of the memoir, “Smallest Lights in the Universe,” astrophysicist Sara Seager.

Originally Aired March 15, 2021

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Could the Higgs field vary across space and time? Neil deGrasse Tyson and comic co-host Chuck Nice answer fan questions on cosmic inflation, quantum fluctuations, and the earliest moments after the Big Bang with cosmologist Brian Keating.

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