(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 ...

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 ...

From the longest tunnel of the ancient world to a highway suspended above raging waters, Rome built engineering marvels that still defy belief. Explore three forgotten megaprojects that showcase the ...