It was the Civil rights Act of 1866 that was passed by Congress to protect the voting rights of blacks in the South, although it wasn’t very effective, because it couldn't be enforced.
Answer
50 years
Explanation
Early in the 16th century European people knew and believed that all human originally came from the garden of Eden which was located at the confluence of the Euphrates. They were later confused when they realized that there were other people who lived in other places like America . It took them 50 years to have garden of Eden without humans.
