If intelligent life should be common in a universe with hundreds of billions of galaxies, why does the cosmos remain eerily silent? This video explores the famous Fermi Paradox and the Kardashev Scale ...

Archaeologists have long known that complex societies can rise, flourish and then disappear so completely that only scattered ruins hint at what was lost. Now a new wave of research is sharpening the ...

For decades, the search for extraterrestrial intelligence has largely been predicated on a specific assumption: that advanced civilizations will inevitably grow, expanding their energy consumption and ...