Could this dark spot be a fossilized egg yolk? Could it be a layered sediment from water flowing? Check it out. It is still attached to the bed rock:

http://marsrovers.jpl.nasa.gov/gallery/all...54P2933M2M1.JPG

Egg yolk? Hmmmm... so small. Wonder what the magnification on that pic is. Could just be an outcropping of rock.

Mars' atmosphere is very thin, so lots of micro-meteorites come through without burning up. Could just be a little impact, melting rock into a bubble.

Or who knows, might be a yolk. Would be nice if they brought that rock up and actually found some form of DNA or something there

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"It matters not how long you live; it matters how you live it."

I would doubt the egg-yolk scenario myself, but it is well argued that water did indeed once flow on Mars, so we're bound to find all types of evidence of the effects water has on a given surface, and this could be another of them.

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"All truth passes through three stages. First, it is ridiculed, second it is violently opposed, and third, it is accepted as self-evident." Arthur Schopenhauer - renowned 19th Century German philosopher.

If thats the egg (yolk), then where is the chicken?

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And so it was, however late . . .

Maybe the egg came first.

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The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.
--Isaac Asimov

Apart from wondering at the resurrection of the thread, without additional information about the image I'll go with impact splatter.

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And the "driving on the freeway on a scooter" analogy still holds true because the pilots are sitting in 7 to 30 ton aircraft o' doom and you are running around them in your very own Meatbody, Mark I. Beep, beep.
Trying to make sense of computers, The Error Log.