Why doesn’t the United States have a base on the Moon? Because getting to the Moon was a matter of national security. Setting up a permanent base there? Not so much.
Last December, a company by the name of Golden Spike announced it would launch commercial exploration missions to the Moon beginning in 2020. Today, they're having trouble drumming up public support in the form of a crowdsourced ad campaign.
Back in January 2012, Newt Gingrich promised the American people that, if elected, we would have a permanent moon base "by the end of his second term."
So, you are on the moon and need to build a new structure. As one of the first lucky colonists there, what are you going to use? Lunarcrete of course.
One of the many obstacles to establishing a base on the moon is determining how to supply oxygen to lunar residents. But a team of scientists have found a way to extract oxygen from the moon's greatest resource — rocks.