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 ...

The Ordovician period is notable for the Great Ordovician Biodiversification Event, a time when life on Earth experienced a remarkable evolutionary expansion.

And—according to a study recently published in the journal Earth and Planetary Science Letters—during an era known as the Ordovician period, it may have once had rings. Seriously.

The End-Ordovician Extinction was the first of the so-called ‘Big Five’ mass extinctions in the history of life on Earth - more than 80% of species in the oceans died out. But could you ...

Earth may have had a ring made up of a broken asteroid over 400 million years ago, a study finds. The Saturn-like feature could explain a climate shift at the time.

If you were to look up from Earth some 466 million years ago, you might have seen a gleaming ring stretching across the sky, some scientists say.

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 ...

Until recently, scientists thought arthropods flourished during the Cambrian Period (538 million to 485 million years ago), which came before the period in which the specimen found by Parry's team ...

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 ...

And—according to a study recently published in the journal Earth and Planetary Science Letters—during an era known as the Ordovician period, it may have once had rings. Seriously.

Earth may have had a ring made up of a broken asteroid over 400 million years ago, a study finds. The Saturn-like feature could explain a climate shift at the time.

   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.