Explore visionary megastructures poised to redefine our future, from Earth's towering arcologies to colossal space-based ...

The Three Gorges Dam was built on the Yangtze River and is known as the most powerful dam by hydroelectric capacity to date.

Researchers found seven stars in our galaxy that might host alien megastructures called Dyson spheres. But these stars' strange behavior could also be explained by other phenomena, like clouds of dust ...

There are three ways to look for evidence of alien technological civilizations. One is to look out for deliberate attempts by them to communicate their existence, for example, through radio broadcasts ...

Throughout the 1960s and ’70s, starry-eyed architects set their minds to megastructures – massive, multi-purpose designs that could house communities or even entire cities. Complex and expensive to ...

We peel back the layers of the great church of Hagia Sophia in Istanbul to reveal its incredible engineering secrets, and vividly bring to life the astonishing story of its construction. We peel back ...