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https://www.aol.com/articles/250-million-old-fossil-proves-200700193.html 250-million-year-old fossil proves that mammal ancestors laid eggs - AOL Apr 18, 2026 - The little skeleton was curled so tightly it looked as if it had never really entered the world. For years, that mattered because paleontologists suspected... 250 million year mammal ancestors laid old fossil proves eggs https://www.scientificamerican.com/article/250-million-year-old-fossil-proves-mammal-ancestors-laid-eggs/ 250-million-year-old fossil proves mammal ancestors laid eggs | Scientific American Apr 15, 2026 - Laying eggs may have helped mammal ancestors thrive after Earth’s worst mass extinction 250 million year mammal ancestors laid old fossil scientific american proves https://sciencedaily.com/releases/2026/04/260414075642.htm Mammal ancestors laid eggs, and this 250-million-year-old fossil finally proves it | ScienceDaily In the aftermath of Earth’s most catastrophic extinction event, one unlikely survivor rose to dominate a shattered world: Lystrosaurus. Now, a stunning fossil... mammal ancestors laid 250 million year old fossil eggs finally https://www.popsci.com/science/ireland-gray-rocks/ Ireland's 250-million-year-old gray spot | Popular Science Mar 17, 2026 - A reminder that Ireland isn’t just 50 shades of green—there’s some very old gray, too. 250 million year old gray popular science ireland spot