Freitag, 16. April 2021 - 07:02 Astronomie - Alien hunters should search for artifacts on the moon, study suggests 16.04.2021 Artifacts last longer than signals and may be cheaper for alien civilizations to send out. Quelle: SC Astronomie - Alien hunters should search for artifacts on the moon, study suggests « Zum vorherigen Eintrag Zum nächsten Eintrag » 1067 Views