re: #393 Targetpractice, Worst of Both Worlds

Best thing we can hope to do is leave some sort of landmark that will signify that we were here. Right now, there’s only a few, such as Mt. Rushmore, that will weather the next few million years in recognizable form.

Well, that and the bunch of space junk that will sit on the lunar surface, undisturbed, for millions of years as well.

Devils Tower will remain beyond Mt. Rushmore? But even Mt. Rushmore will eventually erode. Don’t know the geology there. Even then. It’s certain that within 1 million years it will be almost gone? Perhaps 100s of thousands of years.