[Q&A+] Alternative Dyson Spheres, Vera Rubin's Data, Source of Magnetars

BONUS QUESTION STARTS AT 12:43 Watch the video here (with no ads) or on YouTube: https://youtu.be/aALqt_Ng0dU 00:00 Start 00:26 [@ar-visions] Are white dwarf a solution for Dyson spheres? 02:41 [@gumby2ms] How will Vera Rubin's data releases work? 06:48 [@karandeepgill5589] How much of a galaxy does the SMBH take up? 09:47 [@hangmann747tinmann8] Where do magnetars come from? 12:43 [@logicbug] What if the laws of physics are not uniform across the Universe?