Deep beneath the desert plateau of Saqqara, a row of colossal stone boxes has become a lightning rod for anyone convinced that ancient Egypt once wielded a level of technology we no longer understand.

For over a century, strange machining marks on Egyptian stone have defied explanation, showing levels of precision beyond even modern tools. Some researchers now connect this evidence to a dooms day ...

Sumerians used advanced ancient technology to engineer bitumen with fibers and minerals, revealing sophisticated material science.