kwj@szmer.info to Science@beehaw.org · 1 year agoWhat Supernova Distance Would Trigger Mass Extinction? | PBS Spacetimewww.youtube.comexternal-linkmessage-square1fedilinkarrow-up121arrow-down10
arrow-up121arrow-down1external-linkWhat Supernova Distance Would Trigger Mass Extinction? | PBS Spacetimewww.youtube.comkwj@szmer.info to Science@beehaw.org · 1 year agomessage-square1fedilink