The technology wasn't aliens, but time travelers from the far future, where they finally mastered speed going faster than light, taking the role of the building planner, and doing the things
If they had mastered FTL travel I would have hoped they'd have given us something better than a ******* huge tomb for a Pharaoh. Like how the hell did they manage FTL and explain how E = mc² is wrong and what is correct?
According to E = mc² the more energy an object has due to its motion the more mass it has and therefore the more energy it takes to go faster. So if an object is travelling at light speed it has an infinite mass and takes an infinite amount of energy to more it.
tldr no normal object can travel at FTL speeds or even at the speed of light
I know this is probably a joke but I find science and **** interesting.
Use an Alcubierre Drive. It bends the space time, making a wave that you ride on, technically not going faster than light, but going FTL than the light outside the wave