Now, an international team has discovered an entire ecosystem preserved in sedimentary stone from the Early Pennsylvanian (a period from around 320 to 318 million years ago), containing more than ...

These discoveries suggest that humans were able to live in rainforest before they left Africa, the home of our species. Until ...

For example, marble is created when limestone is pressure-cooked within the earth, causing the minerals that compose the stone to re-form into new crystals. Sedimentary rock is formed by the ...