Across the world, archaeologists keep stumbling on structures so old, so large and so technically sophisticated that they ...

A group of researchers have identified at least seven stars that might be surrounded by advanced alien mega-structures known as "dyson spheres." NBC News' Ellison Barber speaks with Janna Levin, a ...

Although human constructions have modified natural spaces for millennia, few plans or maps predate the period of the literate civilizations of Mesopotamia and Ancient Egypt. Researchers from the ...

A team of Italian scientists took the world by storm last March when they announced the discovery of a colossal underground complex plunging nearly 3,500 feet beneath Egypt's Giza Plateau and linking ...

Get ready to explore some of the wildest construction projects that didn’t exactly go as planned! From massive bridges that collapsed to bizarre buildings that make you wonder, “What were they ...