Conversation so far:
What is Columbia Hills?
The Columbia Hills are a range of low hills inside Gusev crater on Mars.
What happened when Spirit drove from Bonneville crater in a direct line to the Columbia Hills?
Within Hank's Hollow was the strange-looking rock dubbed Pot of Gold. After a detailed analysis with the AXPS-and the Mößbauer instrument it was detected that it contains hematite.
Why is finding hematite significant?
Hematite can be built in connection with water.
What did the Spirit do after finding the hematite?
In Deep Sleep Mode the rover was shut down completely during the night in order to save energy, even if the instruments would fail.

Question: Is there anything else significant about this time?
Self-contained rewrite: Is there anything else significant about the rover Spirit's time on Mars?