What Supernova Distance Would Trigger Mass Extinction? | PBS Spacetimekwj🌐🇺🇦 ⚪🔵🟡⚪@szmer.info to Science@beehaw.org – 21 points – 1 years agoyoutube.com1Post a CommentPreviewHotTopNewOldI see PBS Spacetime, I upvote.
I see PBS Spacetime, I upvote.