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Originally Posted by Clark Gilbert
Blue
What's the blue stuff? From all the other pictures there hasn't been anything that's been remotely colored like that. hmmmmm
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It's not really blue. It is just the particular filters that were used when the image was taken with the PanCam instrument removed out the dominant red frequencies from the scene, and the remaining tones contained more blue than any other hue. In other words, there is more blue to the sphericles than other elements in the image, but the blue is overwhelmed by the red components. To the human eye, the little sphericles apear a dark red-grey.
All that said, we still don't know what those little things are...
-dave