of the original works cited are made in each case. The selected pieces are connected by Professor Altschule's useful commentaries. Unfortunately his general knowledge of the earlier historical periods is defective, and, throughout, the background to medical events is mostly lacking. No attempt is made to identify or comment on the authors selected, and citation of secondary sources is virtually...

We identify temporal variations in surface albedo at Jezero crater using first-of-their-kind high-cadence in-situ measurements of reflected shortwave radiation during the first 350 sols Mars 2020 mission. Simultaneous Environmental Dynamics Analyzer (MEDA) pressure, radiative fluxes, winds, and sky brightness indicate that these changes are caused by dust devils under typical conditions a storm...