The End is Nigh
The technological singularity is the hypothetical future emergence of greater-than-human intelligence through technological means.  Since the capabilities of such intelligence would be difficult for an unaided human mind to comprehend, the occurrence of a technological singularity is seen as an intellectual event horizon, beyond which events cannot be predicted or understood. Proponents of the singularity typically state that an "intelligence explosion"   is a key factor of the Singularity where superintelligences design successive generations of increasingly powerful minds.
This hypothesized process of intelligent self-modification might occur very quickly, and might not stop until the agent's cognitive abilities greatly surpass that of any human. The term "intelligence explosion" is therefore sometimes used to refer to this scenario. 
The term was coined by science fiction writer Vernor Vinge, who argues that artificial intelligence, human biological enhancement or brain-computer interfaces could be possible causes of the singularity. The concept is popularized by futurists like Ray Kurzweil and it is expected by proponents to occur sometime in the 21st century, although estimates vary.