Archaeologists see Puente Piedra as a frontier of sorts. Wari officials had colonies across Peru between 600 and 1000 CE, ...

Most of the work by the 11,200 construction workers, who have faced sweltering heat and freezing cold, has been out of the public view.

Moving hot oil across Arctic terrain was an unprecedented challenge following the discovery of America’s largest oil field in 1969 in Prudhoe Bay, Alaska.

Federal officials awarded a $1.28 billion border wall project in Southern Arizona to a company favored by President Trump, five months after a previous contract led to accusations of improper ...

A bomb shelter is a purpose-built underground bunker engineered to keep occupants alive during a blast, radiation release, or ...