The black swan theory is a metaphor that describes an event that comes as a surprise, has a major effect, and is often inappropriately rationalized after the fact with the benefit of hindsight. The theory was developed by Nassim Nicholas Taleb.

There is some kind of backup plan for Apophis, right?
On Friday the 13th of April 2029, an asteroid large enough to fill the Rose Bowl will fly so close to Earth, that it will […]