The researchers' idea that Earth once had rings comes from reconstructions of Earth's plate tectonics from the Ordovician period—which ran between 485.4 million years and 443.8 million years ago ...

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This surprising hypothesis, published in Earth and Planetary Science Letters, stems from plate tectonic reconstructions for the Ordovician period noting the positions of 21 asteroid impact craters ...

   The Ordovician period’s impact spike coincides with the Hirnantian glaciation, a period of intense cold leading to glacier formation, sea level drops, and major marine extinctions.

It was a good week for space science, as a trio of Earth scientists at Monash University found evidence that Earth may have had a ring system 466 million years ago—in studying plate tectonics during ...

Manitoba is well-known for its fossil record, including the fossil-filled, world-famous Ordovician-aged Tyndall Stone and the ...

The Ordovician period offers a detailed window into early marine ecosystems and climatic transitions, with palynology and microfossil biostratigraphy serving as key tools in reconstructing these ...

Scientists studying the geology of the Ordovician Period about 466 million years ago report evidence that Earth's ring system created a telltale pattern of impact craters, and it may also explain ...

Around 466 million years ago, at the beginning of the Ordovician period, many more meteorites crashed to the Earth, leaving specific impact craters in the geological record.