(cokada/iStock/Getty Images) Alien megastructures built to harvest stellar energy or alter the orbits of stars may be physically feasible, according to a new analysis – satisfying both our sci-fi ...

There are three ways to look for evidence of alien technological civilizations. One is to look out for deliberate attempts by them to communicate their existence, for example, through radio broadcasts ...

This programme unveils the engineering secrets of six iconic megastructures that went on to spark a technological revolution, ultimately changing warfare forever. The Nazis built some of the biggest ...