Colin M. Dundas Lauren A. Edgar Nathan T. Bridges 2016 <p><span>The study of Earth's surface and atmosphere evolved from local investigations to the incorporation of remote sensing on a global scale. The study of Mars has followed the opposite progression, beginning with telescopic observations, followed by flyby and orbital missions, landers, and finally rover missions in the last ∼20 years. This varied fleet of spacecraft (seven of which are currently operating as of this writing) provides a rich variety of datasets at spatial scales ranging from microscopic images to synoptic orbital remote sensing.</span></p> application/pdf 10.1016/j.icarus.2016.08.021 en Elsevier Special section introduction on MicroMars to MegaMars article