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"Aside from just a curiosity, it allows us to know exactly where all the lunar samples came from relative to one another," said planetary scientist Jeff Plescia of the Johns Hopkins University Applied Physics Lab, who uses the Lunar Reconnaissance Orbiter spacecraft to look for human artifacts on the moon. But our tracks won't last forever. A new paper in the Journal of Geophysical Research traces how tracks left by the Mars rovers Spirit and Opportunity are wiped away by the wind, usually within a Martian year. "It's a little humbling," said planetary scientist Paul Geissler of the U.S. Geological Survey, lead author of the new paper. "Mars will just clean up after us, and wait for the next visitors."
The rover's tracks are clear and sharp in the top image. But 22 Martian days later, they were completely obliterated, filled in with new soil blown in from somewhere else
Originally posted by leira7
no, these aren't foot prints, this is a natural phenomena caused by the melting and refreezing of the permafrost, it creates a rippled effect, that just happens to look kinda like Astronaut boots.
Originally posted by anon72
Humans have scribbled "We were here" all over the solar system. From footprints on the moon to burnt-out landers on Titan, the visible records of our excursions past Earth are badges of pride — not to mention unique opportunities to do science.