What is (or was) the big bang? Learn this and more with “Astro-Investigates,” the video series that explores and explains big astrophysics topics with the help of NASA scientists. In this episode, you’ll hear from: Alina Kiessling - NASA JPL Astrophysicist Dida Markovic - NASA JPL Astrophysicist Ami Choi - NASA Goddard Space Flight Center Astrophysicist Sangeeta Malhotra - NASA Goddard Space Flight Center Astrophysicist Host and Co-Producer: Chelsea Gohd Editor/Director/Co-Producer: Keith Miller (Caltech-IPAC) Science Visualizations/Co-Producer: Robert Hurt (Caltech-IPAC) Cinematographer: Isabel Swafford To learn more about the big bang and NASA missions studying the strange history of the universe, visit: https://science.nasa.gov/universe/overview/ Credit: NASA/JPL-Caltech