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The Japanese Space Agency, JAXA, has reported the discovery of a large vertical shaft on the moon. The hole is nearly circular, about 213 feet (65 meters) across with a depth of 262 to 289 feet (80-88 meters). JAXA's lunar probe, SELENE captured images of the giant hole. Junichi Haruyama led the team that analyzed the images and determined the approximate size.

The hole could one day be used to shield people and equipment from radiation. The discovery is further significant because of Heinlein's novel, The Moon is a Harsh Mistress. In the novel humans worked and lived in caves on the moon. The lunar colonists were led in rebellion against their earth bound landlords by a giant computer named Adam Selene.