Space exploration began with John F. Kennedy’s urging for America to put a man on the moon in 1961. Thirty-nine years later, the International Space Station went into orbit, and with it, the goal of continuous human habitation in space.
The next series of NASA missions may see astronauts going to Mars. The past 54 years have been rich with research paper topics on the human exploration of space; what will the next half a century hold? Read more