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 ...

If your understanding of Stone Age humans is one of primitive cave people bashing rocks together, then perhaps it’s time to think again. Our ancient ancestors were able to build huge Neolithic ...

The world was electrified last year when it was suggested that scientists had spotted an “alien megastructure” orbiting a distant star. Now a space boffin has suggested huge extraterrestrial ...

The excavation of a Stone Age community center in Ukraine is helping explain why large groups of tens of thousands of people flourished and then fell more than 5,000 years ago. The "megastructure" ...

KIC 8462852, the strangest star in the galaxy, dims and brightens in a way that could be explained by an advanced civilization. But the star's namesake has nixed that idea. Eric Mack has been a CNET ...