The mysterious star discussed in this video is up to its tricks again. It has begun dimming once more, leaving scientists rushing to turn telescopes across the world to watch it. A number of respected astronomers speculated that the dimming could be caused by a Dyson Sphere – a theorized alien superstructure built around a star to capture some of the energy from the star to power advanced civilizations. Neither that or any other possible explanation have been proven. Perhaps with telescopes worldwide examining it as it dims this time, we may get a better idea of what is really going on.
H/T New Scientist