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

Follow along as NASA launches the Mars 2020 Mission, perhaps the most ambitious hunt yet for signs of ancient life on Mars. "Looking for Life on Mars" from NOVA l PBS is now streaming on the PBS Video app. | PBS