1. Centre of Planetary Science and Exploration University of Western Ontario

2.  What did they observe  Revisit the question: How likely is it that water flowed across Mars?

3.  5 instruments  Camera  Spectrometer  Laser Altimeter  Magnetometer  Found gullies  Found gray hematite  An iron oxide mineral  formed in standing water  Site selected for the rovers during the next mission! 1 km

5. March 2004 Microscopic View Opportunity confirmed this presence!! Found mm-sized balls nicknamed blueberries. Significance? On Earth, grey hematite always needs liquid water to form. Opportunity found other evidence that standing liquid water occurred at the landing site.

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