Geology of the Moon

The USGS recently released a comprehensive geologic map of the Moon.

 

Digital versions available at https://astrogeology.usgs.gov/search/map/Moon/Geology/Unified_Geologic_Map_of_the_Moon_GIS.

Unexplained oxygen fluctuations

Oxygen levels above Gale Crater appear to fluctuate seasonally and scientists don’t yet know why.