I believe 10 amendments were added to the constitution by 1791
The 15th amendment gave African american male citizens the right to vote. The 19th amendment gave women the right to vote which was not added until the early 1920's.
I believe they would be most likely to find evidence of life older than Ardi in Africa.
Internment is the confinement of a specific groups of people.
Hope it helped you, and have a great day.