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The amount of electric current drawn by the motor on the right front wheel is in the normal range. Near the end of Spirit's long series of drives from "Bonneville Crater" to the "Columbia Hills," the right front wheel began to draw roughly twice the current of the other five wheels.
The increased current prompted engineers to limit the use of this wheel to preserve its life. Since arriving at the hills, Spirit has had relatively few driving days. The rover team's current working theory on this problem suggests that the recent rest periods have allowed the lubricant in this wheel to redistribute, causing the current draw to return to normal.
Originally posted by spacedoubt
Could be the squeegee man
I'm gonna make a real guess though, and say that it might be an electrostatic effect. Dryness, and the movement of the "air" at night. Both of these Rovers are in locations that are pretty flat, and are known for the formation of Dust Devils, which can build up huge electrostatic charges.
Originally posted by balrog
Another theory...The night time frost that they witnessed on the rovers 'unsticks' and 'lifts' the built up dust then the wind carries it off.
Originally posted by FredT
It actually was an ATSNN story that I had posted here:
But at any rate, I put my money on the dustdevils clearing it off.
Originally posted by onlyinmydreams
4)The next Mars probe is being built in cooperation with a US spy agency.
Now... am I saying that all those things ad up to a conspiracy that involves little green men who dust off rovers? No... what I'm saying is that, based on what the public already knows, there's a lot of evidence that supports the idea that some form of life currently exists on mars... and that larger life forms may have had a chance there in the past. Such a statement by a government agency COULD have caused social problems if it came out at the same time that the US was undergoing an extremely stress-filled election cycle (an election cycle that has resulted in old friends not talking to each other, in some cases).