Scientists are about to start experiments looking for the rarest event in the universe: Neutrinoless double decay. What I had to illustrate was the concept of how this is an event so rare that it happens only once every 100 trillion trillion years. Scientists will be waiting a LONG, LONG time to observe this event happening. Hopefully not trillions and trillions of years, but these experiments are a giant painstaking waiting game. Article written by Matthew Chalmers. Read the full article Here: