When was the voting age lowered to 18?

In 1970, Senator Ted Kennedy proposed amending the Voting Rights Act of 1965 to lower the voting age nationally. On June 22, 1970, President Richard Nixon signed an extension of the Voting Rights Act of 1965 that required the voting age to be 18 in all federal, state, and local elections.

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the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.