In order for an alien civilization to have visited Earth, they would need to be thousands to millions times more advanced than us. So, would we be of any interest to them?
This is just one of so many tidbits of thought, including science and realistic speculation, presented in this documentary. I will need to watch again, to fully appreciate and recall all the interesting facts, figures, and estimates. I found this documentary informative and credible, but with no promises.
This is just one of so many tidbits of thought, including science and realistic speculation, presented in this documentary. I will need to watch again, to fully appreciate and recall all the interesting facts, figures, and estimates. I found this documentary informative and credible, but with no promises.
