Eureka! Moments are moments of sudden insight or discovery, often accompanied by a feeling of joy and excitement. The term 'Eureka!' is attributed to the ancient Greek mathematician Archimedes, who is said to have shouted it when he discovered a method for determining the volume of an irregular object. The acronym AHAS stands for 'Aha! Moments, ' which are similar to Eureka! Moments but are more focused on the feeling of understanding something rather than the feeling of discovery.