Skeleton season may be just around the corner, but the skeleton age dawned with the early Cambrian Period, about 538 million to 506 million years ago. In this time span, most major animal groups ...

Ammonites Ammonites came in a range of shapes and sizes from the truck tyre sized Tropaum imperator to species the size of a garden snail. Their fossils are so common and well kno ...

An international team of scientists unearthed a remarkable diversity of fossil eggshells in Utah's Cedar Mountain Formation, challenging long-held assumptions about the prehistoric ecosystems of ...