There was a time when Mars was still a mystery and we thrilled to the early pulp stories of Edgar Rice Burroughs, Ray Bradbury, Roger Zelazny and many others. It was a desert planet of Martians, ancient cities, canals, exotic landscapes and high adventure.
Though modern science has revealed Mars' secrets now (or lack thereof) this collection harkens back to the pulp fiction style about our red neighbor, before we knew what was actually there.
Edited by George R.R. Martin and Gardner Dozois the Old Mars  anthology contains fifteen all-original stories by a collection of highly acclaimed Science Fiction writers including Mike Resnick, S.M. Stirling, Michael Moorcock and James S.A. Corey, to list a few. Science may have brought Mars into the modern age, but here Old Mars is still a planet that has not lost its mystique.