Humans have long been transfixed by the moon, awed and inspired by its reassuring presence in the night sky and its influence on the tides. In recent decades, though, our fascination with our nearest celestial neighbor has become somewhat more opportunistic: The moon contains valuable resources, and governments and companies are eager to get their hands on them.
One such resource is helium-3 (He-3), a gas that some experts say could unlock clean and abundant energy on Earth as a fuel...