For decades UFOs have captivated the public, even as manyscientists saw them as too taboo to investigate. Now, afterhighly publicized sightings of unidentified objects by Navypilots, UFOs are moving out of the shadows and into thelight, as NASA pledges to study them scientifically. So whatdoes science have to say? Though some are identified asballoons or drones, weather phenomena, or optical illusions,others remain mysterious. Could they be the result of secretnew technology developed by other governments – or our own?And what would it take for alien engineers to traverse vastdistances to send probes or visit Earth from other solarsystems? Explore the evidence, as astrophysicists andengineers use new technologies to investigate the strangestobjects in our skies.
