[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