10 天
Space.com on MSNScientists discover Earth's oldest impact crater in Australia"Given how rare such evidence is due to [Earth's] geological recycling processes, this is a major breakthrough in ...
Led by Curtin University geologists Chris Kirkland and Tim Johnson, a research team unearthed this primeval crater beneath ...
5 天
FOX 56 News on MSNFossilized ‘Chipmunk Shark’ teeth discovered in Mammoth Cave rock layerThe Chipmunk Shark was believed to have swam along the ocean floor that is said to have covered much of central Kentucky ...
What Was Happening on Earth at This Time The Precambrian is the earliest of the geologic ages, which are marked by different layers of sedimentary rock. Laid down over millions of years ...
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