Way back in 1969, the Apollo 11 crew carried a silicon disc containing goodwill messages from 73 world leaders. The disc, which is the size of a coin, was left on the Moon by the astronauts.

What Is The 1976 Eisenhower Dollar Made Of? The 1976 Eisenhower dollar or the 1776-1976 bicentennial Eisenhower dollar was made of 75% copper and 25% nickel. There is also a silver coin variety that ...