August 10, 20205 yr This bundle contains a detailed chronology of contact science (CS) activities and targets conducted by both MER rovers. The term contact science encompasses measurements executed by any of the instruments on the rovers’ Instrument Deployment Device (IDD), namely the Alpha Particle X-ray Spectrometer, Mössbauer, Microscopic Imager, and Rock Abrasion Tool. The data were compiled and archived by the PDS Geosciences Node.