Are There Lost Alien Civilizations in Our Past?
Kurzgesagt – In a Nutshell1 HN recommender · recommended in 1 month, 2023-2024
14.2M views · 4 years ago · explainer · evergreen
Kurzgesagt asks whether advanced civilizations could have existed on Earth in the deep past and left little evidence. It looks at time as a dimension for searching for alien civilizations and the limits of the geological record.
HN brings it up in threads on ancient civilizations and detecting past technology in geology.
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3 comments from Hacker News
Kurzgesagt did a video on this. Though they discuss how advanced civilizations could have existed on Earth and we might not even know it because there wouldn’t be much left and what was left might be so unusual that we might chalk it up to natural phenomena. ▶ this video
Along the same lines as the pbs video, I enjoyed Kurzgesagt's video [0] about our ability to sense ancient aliens. [0] ▶ this video 12 minutes
Kurzgesagt also: ▶ this video And just like the paper, it acknowledges the challenges in detecting such evidence due to the limited and complex nature of the geological record.