Aliens may have existed in our solar system long before us

nypost.com ^ | Jasper Hamill, The Sun

[BenLurkin]

“A prior indigenous technological species might have arisen on ancient Earth or another body, such as a pre-greenhouse Venus or a wet Mars,” he wrote.

...

Earth’s plate tectonics would effectively have “erased” the traces of a civilization that lived billions of years ago.

Venus is in the grip of a severe greenhouse effect and also undergoes similar “resurfacing” that would scour it clean of artifacts.

This leaves just a handful of places where archaeologists might find traces of a lost extraterrestrial civilization.

“Remaining indigenous technosignatures might be expected to be extremely old, limiting the places they might still be found to beneath the surfaces of Mars and the moon, or in the outer solar system,” Wright added.

...

The astronomer suggested that very old spaceships could still be lingering in the Asteroid Belt or Kuiper Belt, a disc at the very edge of the solar system that’s made up of icy objects.

These artifacts are likely to be the remains of ancient probes, space bases or industrial facilities.

“In the case of a prior indigenous technological species, the artifacts might have had totally different purposes, such as asteroid mining operations or settlements on other planets and moons,” Wright wrote.

“Such structures would be expected to fall into disrepair, especially if its creators are absent.”

So where are these aliens likely to have come from?

Wright suggested they may hail from somewhere that’s very close to home.

The presence of intelligent life on Earth makes it more likely that ye olde aliens hailed from this solar system, rather than being descended from an “extraterrestrial species that crossed interstellar space,” he concluded.

[SunkenCiv]

Because of the source (”The Sun”) I thought this was a put-on. It ain’t.

http://sites.psu.edu/astrowright/presentations-and-videos/

https://arxiv.org/pdf/1704.07263.pdf

[SunkenCiv]

10 SETI Messages That We May Not Want to Receive An exploration of alternative SETI messages that may not say hello. | Published on Nov 6, 2017 | John Michael Godier | from his Patreon page -- "I am passionate about all science fiction, however with my own writing I want to create hard science fiction stories that blow people's minds but stay within the confines of the scientifically possible. Plus, I just want to spin a good old fashioned entertaining yarn in the process. In addition, I am an aspiring documentary filmmaker and maintain a science and technology based YouTube channel showcasing interesting and unusual subjects from the realm of hard science and futurism." John Michael Godier

[SunkenCiv]

Note: this topic is from 04/29/2017. Thanks BenLurkin.

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[SunkenCiv]

"But I am not really willing to accept your premise, because it may well be that the means of communications they have are of a kind that we do not know how to receive, and that they would not have the means of communicating with sufficiently powerful radio or optical signals. That is something which, technologically, is too difficult for them but they would have some other means we would not recognize." -- Thomas J. Gold, 'Communication with Extraterrestial Intelligence' (Sagan, ed)

"To consider the Earth as the only populated world in infinite space is as absurd as to assert that in an entire field of millet, only one grain will grow." -- Metrodorus, 4th c BC Greek philosopher

"Heaven and earth are large, yet in the whole of space they are but as a small grain of rice. How unreasonable it would be to suppose that, besides the heaven and earth which we can see, there are no other heavens and no other earths." -- Teng Mu, 13th c AD Chinese philosopher