What if an alien civilization did not just exist somewhere in the universe, but actually reached Earth in the distant past?

A documentary filmmaker sparked a discussion of advanced Martian civilizations after sharing footage that appeared to depict a “three-sided pyramid” on the Red Planet.

But sometimes the most fascinating way to explore history is by asking a simple question: what if things had gone differently? Alternate history stories take familiar timelines and twist them, ...

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 ...