A whistleblower claims that the U.S. government is covering up what it knows about aliens on Earth, and several military pilots recently testified to seeing strange objects in the sky. It kinda feels like the tide is turning on UFOs — even NASA is taking these sightings seriously. So what’s going on here? Have aliens visited? And will we ever find alien life somewhere … out there? We speak to astrophysicists Prof. Kevin Knuth and Dr. Sara Webb.Learn more about your ad choices. Visit podcastchoices.com/adchoices