[Q&A+] Sun's Siblings, Symmetrical Universe, Biosignature Molecules

Can we find siblings of the Sun? Is the expansion of the Universe symmetrical in all directions? Which molecules can be considered biosignatures? And in Q&A+, I answer a tricky question about Star Wars vs Star Trek. BONUS QUESTION START AT 18:33 Watch the video here (with no ads) or on YouTube: https://youtu.be/IGbFcmWjYd4 Here's a link to the full, unedited livestream: https://youtube.com/live/gENBle2AVDk