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 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" ...

Dyson spheres, theoretical megastructures proposed by physicist Freeman Dyson in 1960, were hypothesised to be constructed by advanced civilisations to harvest the energy of host stars. It’s thought ...

In the classic 1937 sci-fi novel "Star Maker," author Olaf Stapledon imagined a massive machine that could encompass an entire star, capturing its energy and harnessing it to provide near unlimited ...

In a quiet corner of Europe’s limestone backcountry, researchers have uncovered a discovery that could turn our understanding of prehistoric life on its head. Four massive stone megastructures, hidden ...

A European Space Agency catalog of the Milky Way's billions of stars could be hiding evidence of highly advanced alien civilizations with serious building skills. Eric Mack has been a CNET contributor ...

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 ...