GETTING ‘WRINKLES’

The moon has “shrivelled” as its interior has cooled over the eons, akin to a grape transforming into a smaller raisin. As a result, it has acquired thousands of small surface wrinkles in the form of features called thrust fault scarps

THOMAS WATTERS, planetary scientist, Smithsonian Institution, who led the research The moon has somehow managed to remain tectonically active after 4.51 billion years.