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

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 ...

A story that went viral this week reports that astronomers finally found E.T., but those aren't the facts. CNET's Eric Mack talks with the astronomers involved about what is still a very interesting ...

The Milky Way is seen during the Perseid shower above the Los Padres National Forest in Frazier Park, California, Aug. 12, 2009. Reuters/Mario Anzuoni Are there civilizations in the universe's faraway ...

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 ...

'National Geographic Channel MegaStructures' takes a look at the construction history of Boston Big Dig project. Costing almost 15 billion dollars and taking almost 20 yrs to complete, the Boston's ...