How old was obama when he got elected president?

Who were some of the first people to use prostheses?

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?

What was the name given to ronald reagan’s foreign policy