I believe we covered this here...about two months ago
See the thread starting at:
http://www.habitablezone.com/space/messages/11633.html
Alex R. Blackwell
University of Hawaii
Space/Science » in reply to Outflow Channels May Make a Case for a Bygone Ocean on Mars.
See the thread starting at:
http://www.habitablezone.com/space/messages/11633.html
Alex R. Blackwell
University of Hawaii