Collapse breccia near a lava tube entrance (Photo by Dr. Harmon Maher, Univ. Nebraska) The science team of the Japanese Kaguya mission have just published a paper claiming to have found an opening to a cave on the Moon. Such a discovery is a potentially important development for future lunar habitation. Lava tubes are large caves created during the volcanic eruption of a very fluid, highly effusive lava. They are common on Earth, especially in iron-rich basaltic lavas, such as those that make up most of the Hawaiian islands. The idea that caves occur on the Moon has been around for a long tim [...]