On Native American Heritage Day, we examine a long-overlooked marvel of ancient engineering that had been tucked away beneath ...

The ancient Inca built a complex system of roads that span some 20,000 miles and range in altitude from sea level to 14,000 feet, all without the benefit of special tools or even a formal writing ...

The ingenuity of the construction techniques used by Greek builders 2,000 years ago continues to dazzle the world. What did these ancient engineers get right? And how does looking to the past help ...

The famed Colosseum in Rome fell into neglect hundreds of years ago, making visitors today strain to imagine how it looked in all its glory back in ancient times. Now the huge stone amphitheater, one ...

As the saying went, all roads once led to Rome—and those roads stretched 50% longer than previously known, according to a new digital atlas published Thursday. The last major atlas of ancient Roman ...