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.

What do you do, when you wake up to a flipping magnetic field?
Scientists say the Earth’s magnetic field could be about to flip upside down. During the thousand years it will take for this change to complete, […]