"Overall, a black hole can be a promising source and is more efficient than harvesting from a main sequence star..." by Andrei Dergalin via Sputniknews Headline Image: © CC0 The researchers note that they "only discuss the civilisations which were born and raised from other stars" in their study. While some scientists strive to discover whether alien civilisations might exist somewhere in the depths of space, a team of researchers led by astronomer Tiger Yu-Yang Hsiao from the National Tsing Hua University is looking into a very specific type of potential martian building project. According to Vice News, Hsiao's team essentially searches for evidence of hypothetical megastructures known as Dyson spheres. However, while a usual Dyson sphere is thought to be an artificial structure that encompasses a star and captures a large portion of its power output, the researchers proposed looking for an "inverse Dyson sphere" (IDS) which could siphon power from a black hole in a similar fashion.