Some things we see in space appear to outpace light. Now we are learning to harness these bizarre optical illusions to ...

This sort of motion is common in galaxies sporting active central supermassive black holes, like the one in the nearby elliptical galaxy M87. Astronomers have measured motion in M87’s ejecta as rapid ...

Neuroscientists are zeroing in on how special kinds of brain cells help us see things that aren’t actually there. ...