(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.
The Presidential Dollar Coin Act. The program was authorized under The Presidential $1 Coin Act (Public Law 109-145), which was signed by President George W. Bush on December 15, 2005. The Act provided for the redesign and issuance of $1 coins honoring the former Presidents of the United States during the period beginning January 1, 2007.