Are We The First Advanced Civilization in The Solar System?

Humans are believed to be the most technologically advanced civilization that’s ever set foot on Earth, or really anywhere in the Solar System. But are we the first? Could there have been an advanced civilization that walked the Earth millions or even billions of years ago, and then died out long ago, their technology and structures lost to the eons. And how could we know? Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio Video Podcast version: ITunes: https://itunes.apple.com/bh/podcast/universe-today-video/id794057165?mt=2 RSS: https://www.universetoday.com/video What Fraser s Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Weekly email newsletter: https://www.universetoday.com/newsletter Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Google+ - https://plus.google.com/+universetoday/ Instagram - http://instagram.com/universetoday Team: Fraser Cain - @fcain / frasercain@gmail.com Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - weber.chad@gmail.com Chloe Cain - Instagram: @chloegwen2001 References: https://arxiv.org/pdf/1704.07263.pdf https://arxiv.org/pdf/1804.03748.pdf https://www.theatlantic.com/science/archive/2018/04/are-we-earths-only-civilization/557180/ https://arxiv.org/pdf/1111.1212.pdf