What does "Mercury in retrograde" mean? It's an astrological event which occurs three to four times a year, when the planet Mercury appears to be moving backwards. Of course, it's only an optical illusion, but people who believe in astrology think that when Mercury is in retrograde, things go haywire. This list is full of crazy things that happened when Mercury was in retrograde.
Of course, the events on this list were probably not caused by Mercury being in retrograde, as there are far more catastrophic events that have taken place when Mercury was going forward like it's supposed to. Nonetheless, all of these disasters fall within the Mercury retrograde time period.