title: Planetary science. Layers within layers hint at a wobbly Martian climate.
authors.forename: Richard A
authors.initials: RA
authors.lastname: Kerr
mesh_terms: D002980:Climate; D005118:Extraterrestrial Environment; D019015:Geologic Sediments; D007053:Ice; D018535:Mars
chemical_list: D007053:Ice