Nick Hoffman wrote:
There is no evidence for glaciation on Mars, despite the determined efforts of one of my colleagues and co-authers Jeff Kargel.

Alex writes:
"[N]o evidence for glaciation on Mars"? Forgive me, Nick, but this statement borders on pure hyperbole. While one may disagree with martian glaciation models, as I do, (especially with the problem of precipitation, which is sine qua non for conventional glaciers on Earth), there is most certainly geomorphologic evidence for its past occurence on Mars. As you mentioned, Kargel has done a great deal of the work in this area,

see http://www.sciam.com/1196issue/1196kargel.html

but there are others. Here are few of the more recent examples:

The Evolution of Lacustrine Environments on Mars: Is Mars Only Hydrologically Dormant?
Nathalie A. Cabrol, Edmond A. Grin
Icarus, Vol. 149, No. 2, Feb 2001, pp. 291-328

Head, James W. 2001
Mars: Evidence for geologically recent advance of the south polar cap
J. Geophys. Res. Vol. 106 , No. E5 , p. 10,075

Lucchitta, Baerbel K. 2001
Antarctic Ice Streams and Outflow Channels on Mars
Geophys. Res. Lett. Vol. 28 , No. 3 , p. 403

http://www.eurekalert.com/releases/agu-mis011601.html

Alex R. Blackwell
University of Hawaii