Scientists at The University of Manchester have joined forces with a major US Museum and European partners to explore an extraordinary Jurassic dinosaur site in the badlands of Wyoming, USA.

Based on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had ...

Jurassic ammonites, bivalves, mammaliaform teeth and lizards are ... Stegosaurs, for example, went extinct in North America but continued on in Europe for a while. This suggests that the Jurassic didn ...

Laurasia, the northern half, broke up into North America and Eurasia. Gondwana, the southern half, began to break up by the mid-Jurassic ... and coil-shelled ammonites were abundant.

Ammonoidea includes a more exclusive group called Ammonitida, also known as the true ammonites. These animals are known from the Jurassic Period, from about 200 million years ago. Most ammonites died ...