Do you believe in the existence of extraterrestrials? 👽 For decades, UFOs have captivated the public, but many scientists saw them as too taboo to investigate - until now. So what does the science say? Explore the evidence as astrophysicists and engineers use new technologies to investigate the strangest objects in our skies. Don't miss What Are UFOs? from NOVA l PBS on the Cascade PBS app. https://bit.ly/3P1fF0Y | Cascade PBS