What is the enigmatic Sabu Disk—also known as the “Schist Disk”—unearthed from an ancient Egyptian tomb over 5,000 years ago? Some claim it’s evidence of advanced ancient technology: a turbine, ...

Engineers have subjected the Sabu Disk, a roughly 5,000-year-old schist artifact housed in the Egyptian Museum in Cairo, to modern material analysis in an effort to determine its original function.