Scientists baffled by strange infrared signal: alien life or cosmic mistake?

Dyson: Vacuum Cleaner or Alien Mega-Structure? When you hear “Dyson,” what pops into your head? A brand of vacuum cleaner? Or ...
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Why some still think aliens built the Giza Pyramids

The Giza Pyramids are among the best documented construction projects of the ancient world, yet a stubborn slice of popular culture still credits them to visitors from another planet. I want to ...

[Side Note 7/Talking about Space as a Hobby] A star suddenly dimmed. Are aliens building something? — The Mystery of Tabby's Star and the Dyson Sphere

What if aliens were building a massive power plant?Last time, I talked about the "Kardashev scale," which classifies the ...
The Conversation

Why some people still believe that aliens shaped ancient civilisations

Erich von Däniken proposed that monumental structures such as the pyramids could have been built with help from aliens. Stefan Baumann Could ancient humans really have built the pyramids without ...