Circular mounds of rocks dot the desert landscape at the archaeological site of Tombos in northern Sudan. They reveal tumuli – the underground burial tombs used at least as far back as 2500 B.C. by ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Researchers have explored how the River Nile evolved over the past 11,500 years and how changes in its geography could have helped shape the fortunes of ancient Egyptian civilization. The research, ...