(plural paradigm shifts) 1  A radical change in thinking from an accepted point of view to a new one, necessitated when new scientific discoveries produce anomalies in the current paradigm. ( US) A radical change in thinking from an accepted point of view to a new belief.
The use of IN GOD WE TRUST has not been uninterrupted. The motto disappeared from the five-cent coin in 1883, and did not reappear until production of the Jefferson nickel began in 1938. Since 1938, all United States coins bear the inscription.
Although it may seem unusual today, the United States government once issued a coin worth less than one cent: the half cent. The copper U.S. half cent was authorized for production on April 2, 1792. During its 64-year lifespan as a circulating denomination, five different basic design types of the tiny (0.93-inch) coin were struck. The coins were struck at the Philadelphia Mint and do not have a Mint mark.