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The scientists identified 19 craters (opens in new tab) as the most likely points of origin for the Martian meteorites on Earth. The relatively fresh origin of all these craters helped explain why the smallest ones were still detectable: Millions of years of erosion and other activity on Mars had not yet erased them.Īn image of the Martian meteorite nicknamed "Black Beauty." (Image credit: NASA) These findings suggest that these small craters were formed by the debris from larger impacts after they fell back to the surface. When the researchers investigated the sizes and locations of these craters, they realized that most of the smallest craters were scattered around larger craters that were more than 1.8 miles (3 kilometers) wide and less than 10 million years old. "My team and I developed a crater-detection algorithm to detect all impact craters, down to about 100 meters in diameter, seen on high-resolution images covering the surface of Mars, about 94 million in total," study lead author Anthony Lagain, a planetary scientist at Curtin University in Perth, Australia, told. In the new study, the scientists used supercomputers to analyze images of the Martian surface. Now, researchers may have pinpointed Black Beauty's exact point of origin. Until now, scientists did not know precisely where on Mars NWA 7034 came from.