The fossilized remains belong to Cosmopolitodus hastalis – an extinct mackerel shark closely related to the modern great ...

The fossil that was originally interpreted to be a plant, but researchers have now discovered is the inside of the shell of a baby turtle. Disclaimer: AAAS and EurekAlert! are not responsible for ...

it forms an internal mold ( a 3-D picture of the space inside the shell). If an external mold later fills with sediment or minerals, it can form a cast. Trace fossils are other kinds of evidence that ...

In the Kits: #12: Shark tooth (specifically, the enamel of the tooth) Recrystallization - A process by which the minerals making up the original shell or bone of a fossil change into ... which have ...

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 ...