:rolleyes: Jeez, don’t you pay attention? It’s the lizard-aliens in league with a sect of grays that are infiltrating NASA and want to keep the Mars-base hush-hush until the 12th planet comes and causes a pole-shift. That’s why they’re denying the pyramids and the face.
Try to keep up, will you?
I have nothing useful to add to the topic, but wanted to make a comment.
Where else can we find intelligent debate on Martian wind erosion rates? This place is special.
No arguments on that from me, aclubs. 
And, Welcome to the SDMB.
On Earth? Very good, on anything under say 1m (the height at which effective saltation of wind-borne sand operates) - look up Yardangs. On Mars, I don’t know. The Martian mega-yardangs are likely fluvial, and anyway, Noachian. There was a distinct climate change after, so the last 100 million years have been reasonably dull.
I do know that other erosion/weathering effects will also occur on parts of the Arean landscape - freeze/thaw weathering with CO2 ice, thermal expansion, that sort of thing. Who knows what weird effects happen with the interaction between Dry Ice caps and rocks?
Still, with that said, I’d say the continued existence of many impact craters on Mars points to a conclusion that, yes, we’d still find traces of the Martians if there were any.
Well its obvious isnt it ? The Martian Mammals left their dying planet did a quick non surgical strike with a handy asteroid to wipe out the Terran dinosaurs and weve been here ever since .
Let’s not forget all of that junk we left on the moon. I betcha that will last longer than anything on earth.
Dude that is clearly the face of a Cyberman. Or Dr. Zaius. Either way, it’s a huge conspiracy that’s being covered up by NASA, the National Security Agency, the Air Force Special Forces Cattle Mutilation Wing, and the Salvation Army. (Don’t believe all that crap about alms for the poor; the money you put in those little red buckets goes directly to funding genetic experimentation on flying space turtles. “Gamera loves children,” my ass.)
Stranger
Actually, very little remains of the Martian civilization today. They pretty much shot their bolt with the 1900 invasion. It exhausted their economy so thoroughly that we might soon have to consider a foreign-aid program. That might be hard to sell politically – memories endure of what was done to London – but what if everybody held a grudge?
There is evidence for some geologically recent (~1million) liquid Water on Mars so it wouldn’t ALL need to be wind and sand.
If 200,000 years would be all it would take to remove human traces (except Radioactivitity) – I have to think 100million – even in the more static, but not totally, environment would be more than enough time to remove all traces of John Carter’s kingdom
Of course Gamera loves children. Mmmmmmmm, crunchy.
Well, after you’ve roasted them in gamma flame, sure. But still, he’s hardly the benefactor of Tokyo that he’s portrayed on film.
In more seriousness; lacking the oxygen (or at least oxidizer rich) environment in which to perform energetic chemical reactions, it’s questionable whether a Martian society could even develop. Certainly they’d never get past the equivilent of a Stone Age. Without fire there’s no heat forging or smelting of metals, and without that, there’s a serious question whether they’d build anything more durable than canals or pyramids. Wind erosion isn’t the only factor; in such an environment, a large structure might be buried or sink into the dust, and embedded structures would be filled in. So even if they survived, they might not be immediately visable, though they’d likely show up on a penetrating radar scan. I’m betting more on the ocean-worms on Titan or the Helium-II clams on Pluto.
Stranger
