Matt Siegler, a planetary scientist at SMU, was digging into old data to figure out how hot it is under the moon’s surface when he came upon something surprising: evidence of a massive, ancient volcano.
The moon has always sparked the human imagination — the first known story of explorers landing on the moon was written nearly 2,000 years ago. In work published in Nature this summer, Siegler and his team have added to that legacy.
The best explanation for a chunk of granite this big is volcanic activity. “It’s the fossil of a volcano,” Siegler said. And it’s an unexpectedly large fossil. This granite body would stretch approximately from downtown Dallas to downtown Fort Worth.