Astronomy Fun Fact:Those prominent round brown spots on the left side of the image are ancient volcanos.
One Martian volcano (Olympus Mons) is the biggest volcano in the Solar System.
Nice to see they're still getting mileage out of archived Viking images.
More Mars missions! We need more Mars missions!
Get on the 
list!
To: MozartLover; Joan912; NovemberCharlie; snowfox; Dawgsquat; viligantcitizen; theDentist; grlfrnd; ...
I wouldn't have put this up until after 5 AM Central, but I don't trust the "15 minute" downtime estimate.
Nothing ever runs THAT smoothly! 
To: petuniasevan
At some point something really major happened to Mars. The surface layer, the crust of one hemisphere is missing. The big volcanos are all clustered together and are opposite a big hole. And there is the giant rift valley on a planet with little tectonic activity at present. The idea that the asteroids are the remains of an exploded planet orbiting the sun somewhat beyond Mar's orbit is an old idea but still hasn't faded away.
Van Flandern and Hoagland have pointed out all this and more, including the fact that the huge water discoveries seem to be located in tidal mounds.
Who knows what may yet be discovered on Mars. We should go there, not just with robot ships, but manned expeditions and start digging in for a permanent base.
To: petuniasevan
More Mars missions! We need more Mars missions! Go P7 GO!!!! Wow that would be fun to fly through or have big dune buggy races through...I want to live forever everytime I think about the wonders of the universe...so much to see...APOD RULES!
To: petuniasevan
That is so awesome..I can't imagine how large they are...
To: petuniasevan
The details are incredible..I love the close up.
To: petuniasevan
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To: petuniasevan
What a picture. Thanks!
To: petuniasevan
What a great picture! You know it looks like an object skiped off the surface from the shape of the canyon!
To: petuniasevan
wow
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