Is there anything more fascinating than a hidden world?
Technology has long played the spoiler to these worlds in hiding. We have used ships, airplanes, and rockets to shrink distances. Telescopes, cameras, satellites, drones, and radar help us peer into and map the places we cannot go ourselves. Advances in computer vision and artificial intelligence are creating accessible replicas of complete physical worlds in virtual spaces. All this peels away the concealing layers of time and distance. This issue is all about using technology to explore and expose those hidden worlds,…