[Q&A+] Ancient Venus Civilization, Dark Matter, Great Attractor

BONUS QUESTION STARTS AT 16:22 Could Venus be turned into hell by an ancient civilization that lived on it? Why Dark Matter is not a theory? What's up with all the Great Attractor videos on YouTube? And in Q&A+, what's the current state of lava tube exploration? 👉 Dark Matter in NOT a Theory https://youtu.be/PbmJkMhmrVI 👉 Channels mentioned https://www.youtube.com/@AstroAF/ https://www.youtube.com/@MaximumAstronomy https://www.youtube.com/@frosthastrophotography/ 00:00 Start 00:26 [@9999Joppe] Could an ancient civilization cause the greenhouse effect on Venus? 01:53 [@curtishorn1267] Dark matter is not a theory 12:11 [@evo1ov3] What is the Great Attractor? 16:22 [@brentcalaway] Missions to lava tubes