In a glass case in Cairo, a 5,000-year-old stone disc carved from fragile schist looks less like a ritual object and more ...

Can you — should you — keep expanding at this pace?” “Yes, we can… and yes, we should…. We would be crazy not to.” ...

Exceptionally preserved fossils from the Ediacaran period challenge what scientists thought was possible in sandstone. In the fossil record, creatures without hard shells or skeletons, such as ...