Two surveys of thousands and thousands of stars in our galaxy have revealed mysterious spikes in infrared warmth coming from dozens of them. Astronomers say this may very well be proof for alien civilisations harnessing vitality from their stars by utilizing an enormous building referred to as a Dyson sphere – though they will’t absolutely rule out extra mundane explanations.

First proposed within the Sixties, Dyson spheres are hypothesised constructions that might encompass complete stars to soak up their vitality, a…