Buried bone and shell contain tiny air spaces ... Interpretation of fossils poses another set of challenges, and their age can only be estimated by radiometric dating of rocks they were found ...

The resulting fossils now provide evidence that there really may have been an Age of Monotremes, before other mammals came to dominate. "It's like discovering a whole new civilization," says ...

Good places to find trilobite fossils: Torquay in Devon, Marloes Sands in Wales and Coniston in Cumbria. Two very famous sites are Wren’s Nest in Dudley and Girvan in Scotland. A piece of rock ...

Fossils of them are found all around the world ... Scientists can tell species of ammonites apart through several attributes including shell shape, size, age, location, features such as the number and ...

Scientists use the curve to reconstruct past ocean chemistry and climate conditions, as well as the age of mollusks and other shell-producing marine fossils. Properly dating ancient sites is key ...