It’s not rockets and satellites that make NASA soar. It’s people. NASA Explorers is a new digital series that takes you inside the space agency and follows the pioneers, risk-takers and experts at the frontline of exploration. NASA Explorers: Apollo is an audio series about our Moon and the people who explore it. During the Apollo program, the Moon became a part of the human domain. Twelve astronauts walked on the lunar surface, conducted research there and collected Moon rocks to bring back to Earth for study. Fifty years after humanity’s first steps on the Moon, today’s lunar scientists are searching for answers to the big questions: How did the Moon form? How did our solar system evolve? Did the Moon help life on Earth get its start?