Lights that stop and turn at impossible angles. Discs photographed against a clear sky. Objects that outrun every aircraft we know how to build. For as long as people have looked up, something up there has refused to be explained away.

This section collects the cases worth knowing: the crash that started it all, an object caught circling the Earth, rings pressed into summer fields, and the strange physics of craft that should not be able to fly the way they do.