fossilesque@lemmy.dbzer0.comM to Science Memes@mander.xyzEnglish · 3 个月前light pollutionlemmy.dbzer0.comimagemessage-square41fedilinkarrow-up1598arrow-down17
arrow-up1591arrow-down1imagelight pollutionlemmy.dbzer0.comfossilesque@lemmy.dbzer0.comM to Science Memes@mander.xyzEnglish · 3 个月前message-square41fedilink
Or a strong laser pointer