... very credible sources have reported seeing UFOs — unidentified flying objects. Now they’re called Unexplained Aerial Phenomena, or UAP. But whatever you call them, the U.S. government has lately begun taking these mystery objects seriously. Very seriously. And it’s recruited a lot of scientists to investigate what’s behind them (albeit quietly).

We still don’t know what the pilots and others have seen. But here’s what’s motivated the new and growing scientific interest in them...