In a first-of-its-kind study, Stanford researchers have measured how the abundance of ocean life has changed over the past ...

Dinosaurs ruled the Mesozoic, but Earth’s early ages - like the Ordovician and Silurian - belonged to stranger things. Think sea scorpions longer than humans and jelly-like organisms that left no ...

Plans are in to extend the life of a 200-year-old quarry in North Wales. Ffestiniog Quarry (also known as Oakeley Quarry or ...

More information: Zhutong Zhang et al, Tempo of the Late Ordovician mass extinction controlled by the rate of climate change, Science Advances (2025). DOI: 10.1126/sciadv.adv6788 ...

The large tubules in another Ordovician vertebrate called Eriptychius were similar in structure to these sensilla, but did contain dentine. “This shows us that ‘teeth’ can also be sensory even when ...

Fossils of 444 million-year-old creatures whose bodies were preserved "inside-out" have been discovered in South Africa.

Specifically, the findings support the hypothesis that supernovae could have triggered two of the so-called "big five" mass extinctions: those at the end of the Ordovician Period, some 445 million ...

Now, a group of Earth scientists at Melbourne’s Monash University have asked the question “Did Earth ever have a ring?” And surprisingly the evidence they’ve uncovered points to an intriguing “yes”.

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.

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. A study published this month links an uptick in ...

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 ...

The series of extinctions that occurred during the Ordovician and Silurian periods between 445 and 415 million years ago wiped out as much as 85 percent of all animal species on Earth. It was the ...