Advanced civilizations could leave us a message of their presence(nautil.us)1 points·by dnetesn·4 ปีที่แล้ว·0 commentsnautil.usAdvanced civilizations could leave us a message of their presencehttps://nautil.us/we-were-here-17009/1 commentsPost comment[+]foolzcrow·4 ปีที่แล้ว