Imagine finding an ancient artifact so strange that even experts can't agree on what it was used for! That’s the Sabu Disc, a ...

The Old Kingdom Sun Temple at Abu Ghorub is home to massive stone artifacts that appear to bear signs of advanced machining.

Advanced CNC machining is an example where the so-called “payback period” may not come for years, and there’s no clear way to know when it has arrived. Nailing down the particulars to understand CNC ...