The monkeys liked the taste of sweet potatoes, but they found the dirt unpleasant yet they were eating dirty potatoes for decades. Then, one monkey solved the problem by starting to wash potatoes before eating. Naturally, several more monkeys learned the process from the first monkey and soon the whole tribe of 100 monkeys were washing the potatoes. But then something amazing happened overnight - monkeys on all other islands who never had contact with that tribe separated by sea - suddenly also started to wash potatoes before eating. Scientists were helpless to explain the phenomena