This episode of the Smithsonian National Air and Space Museum’s What’s New in Aerospace? series, focuses on the abundance of confirmed and potential worlds that have been found outside of our solar system – commonly known as exoplanets. The program features experts discussing what we have learned so far in our exploration of exoplanets and how we will peer into the atmospheres of these faraway worlds to look for biomarkers, or signs of alien life. The What’s New in Aerospace? series is presented in collaboration with NASA.