KREEP is believed to have formed during the final cooling phase of the moon, when radioactive elements built up in the space between the moon's newly formed mantle and crust. Studying these elements more closely could help shed light on several mysteries surrounding this period of lunar evolution, including why the crust on the moon's far side is thicker than its visible near side.

The findings are a big clue as to why the far and near hemispheres of the moon look so different.

How horrible that would be! But as I thought about the depiction of the stuffy old man in a tower spouting information from books and declaring “To be sure, the moon is that and nothing more,” I realized that the author had constructed a strawman argument by setting up a simplistic imagined opponent that’s easy to knock down.

Earth’s atmosphere is slowly leaking into space, and new research shows some of it reaches the Moon, where it may be preserved in lunar soil.

The Moon is gradually drifting away from Earth at a rate you could measure with a ruler if you waited […]