Study of Moon Rocks Suggest Interior of the Moon is Really Dry

“It’s been a big question whether the moon is wet or dry. It might seem like a trivial thing, but this is actually quite important. If the moon is dry - like we’ve thought for about the last 45 years, since the Apollo missions - it would be consistent with the formation of the Moon in some sort of cataclysmic impact event that formed it."

“I think the Rusty Rock was seen for a long time as kind of this weird curiosity, but in reality, it’s telling us something very important about the interior of the moon. These rocks are the gifts that keep on giving because every time you use a new technique, these old rocks that were collected by Buzz Aldrin, Neil Armstrong, Charlie Duke, John Young, and the Apollo astronaut pioneers, you get these wonderful insights.”