This month marks forty-five years since men first left planet earth and set foot on another world. The last man to walk on the moon did so in December, 1972, over four decades ago. It's a good moment to ponder what we haven't done since.
There were six successful landings on the moon, and, almost literally, they barely scratched the surface of that body. The later astronauts had “golf carts” that allowed them to travel short distances, but only a fraction of a percent of the Africa-sized area was directly investigated by humans. To say, as some do, that we shouldn't go back, and should instead go on to Mars, would be like saying that, having touched shore in a half dozen places in the Americas, we should have then ignored those continents and gone on to Asia. read more »