Mollusca, Cephalopoda - Existing cephalopoda include squid, octopus, and the pearly nautilus, all very important in modern seas. Some Ordovician cephalopoda around Cincinnati grew up to nearly 4 ...

A weird number of craters are located close to the equator, and the odds that this is random are incredibly low, researchers ...

This era of intense bombardment, known as the Ordovician impact spike, may have resulted from meteorites falling from the ring rather than flying in from space, which would explain the strange ...

Learn more about the time period that took place 488 to 443 million years ago. 3 min read During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the ...

The digging and burrowing of prehistoric worms and other invertebrates along ocean bottoms sparked a chain of events that released oxygen into the ocean and atmosphere and helped kick-start what is ...

How can the soft bodies of coleoid cephalopods so aptly hide in their environment? Why must they? What cells and specialized organs make such crypsis possible for one of the older evolutionary ...

According to some scientists studying cephalopod learning, the cuttlefish can use visual clues to solve mazes, making it as intelligent as the octopus or land animals like the pigeon. A defining ...

But first there was a period of biological regrouping following the disastrous climax to the Ordovician. The recovery soon got under way in the oceans as climbing temperatures and rising sea ...

The Ordovician world was a watery one in which vast oceans covered almost the entire northern hemisphere. In the south, the mega-continent of Gondwana drifted. According to the University of ...

Ammonites were shelled cephalopods that died out about 66 million years ago. Fossils of them are found all around the world, sometimes in very large concentrations. The often tightly wound shells of ...

Drawing on over 300 scientific studies, we have evaluated the evidence of sentience in two groups of invertebrate animals: the cephalopod molluscs or, for short, cephalopods (including octopods, squid ...