Ammonites are a tale of two textures. The prehistoric cephalopods were composed of fleshy soft tissue (the living bit of the animals) and hard external shells, which, according to a paper published ...

Earth once hosted more than 10,000 species of these ancient marine predators. Find out how they lived, when they vanished, ...

Ammonites are a group of extinct cephalopod mollusks with ribbed spiral shells. They are exceptionally diverse and well known to fossil lovers. Régis Chirat, researcher at the Laboratoire de Géologie ...

An oddly shaped fossil in Hokkaido turned out to be a new species of ammonite, spiral-shaped marine creatures from ancient ...

Robotic ammonites, evaluated in a university pool, allow researchers to explore questions about how shell shapes affected swimming ability. They found trade-offs between stability in the water and ...

(Phys.org)—A team of workers with members from institutions in the U.K., Germany and Spain has put online a digitized 3-D model of the "death drag" of an ammonite fossil—it is one of the longest ever ...

A shelled fossil discovered in an amateur’s collection may harbor the first direct evidence of prehistoric sharks eating ammonites some 150 million years ago. The palm-sized ammonite, an extinct ...

Ammonites are among the most common marine fossils from the age of the dinosaurs, but no one has found one like this before. It shows one of the swimming marine molluscs without its distinctive spiral ...

Shelled creatures roamed oceans millions of years ago by jet propulsion, suggests innovative 3D imaging Analysis of an extraordinary fossil discovered in a Gloucestershire gravel pit has given fresh ...

Some extinct species left copious fossil remnants of their existence. Ammonites—an extinct type of cephalopod—are one such example. From the Devonian right up until the Paleocene, wherever ancient ...

Ammonites swam in the Western Interior Seaway that once covered a large portion of North America. These iridescent fossils from South Dakota, around 69–72 million years old, preserve inner shell ...

Ammonites are a group of extinct cephalopod mollusks with ribbed spiral shells. They are exceptionally diverse and well known to fossil lovers. Researchers have developed the first biomechanical model ...