Heavy water on Mars

[John Kierein]

Do they really mean D2O or is this BAD ASTRONOMY?
http://themis.asu.edu/zoom-20030213a.html

Ice is not heavier than water, Ice floats.

<font size=-1>[ This Message was edited by: John Kierein on 2003-02-14 08:13 ]</font>

[David Hall]

Bad wording. I think they really mean "Heavy clouds of water ice".

Clouds don't have to be composed of liquid droplets. Clouds made of tiny ice crystals are common on Earth, so they should also be possible on Mars.