Is our world a test subject from extra-terrestrial life? Watch

serebro
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I'm not much a scientist, but here goes. Couldn't find the most suitable sub-forum, so linked it with religion/philosophy.

OK, so the sun is warming up and eventually going to engulf Mercury and Venus. That will make life on Earth impossible due to extreme temperatures, no water and a complete mess up of the atmosphere. How could life survive this?

It's rather Sci-Fi but people have suggested we move to another planet, either in the solar system or elsewhere. Another possibility is putting cellular life onto different planets, and allowing evolution to take place.

This has got me wondering, is that how we came to be? Science tells us where we started off and then how we evolved over many years, but it cannot explain how or why it began. Did advanced extra-terrestrials realise that their own planet was going to be destroyed by their sun and then launched a plan to 'colonise' planets with resistant, basic life forms. They might have even created evolution, to increase the chances of future survival. They might have been able to terraform planets, but they could have genetically engineered life and then attached it asteroids for a collision or something.

What do you guys think? I'm not saying green, 3-headed aliens are watching us. But perhaps that's how life works?
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TakashiLaSkunk
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It's entirely plausible, maybe not likely, but there isn't any obvious reason as to why it couldn't have happened.
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Infinity_4652
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bump
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Exon
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Evolution is not something that you create but something that occurs naturally as a result of natural selection in organisms over a long period of time. What you're suggesting is colonisation. It's not implausible though we have yet to observe any extraterrestrial life to suggest it and even if we did, we'd have to come up with an explanation for how they came about.
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physicsbook
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You sound like the Scientologists.
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Stiff Little Fingers
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(Original post by serebro)
I'm not much a scientist, but here goes. Couldn't find the most suitable sub-forum, so linked it with religion/philosophy.

OK, so the sun is warming up and eventually going to engulf Mercury and Venus. That will make life on Earth impossible due to extreme temperatures, no water and a complete mess up of the atmosphere. How could life survive this?

It's rather Sci-Fi but people have suggested we move to another planet, either in the solar system or elsewhere. Another possibility is putting cellular life onto different planets, and allowing evolution to take place.

This has got me wondering, is that how we came to be? Science tells us where we started off and then how we evolved over many years, but it cannot explain how or why it began. Did advanced extra-terrestrials realise that their own planet was going to be destroyed by their sun and then launched a plan to 'colonise' planets with resistant, basic life forms. They might have even created evolution, to increase the chances of future survival. They might have been able to terraform planets, but they could have genetically engineered life and then attached it asteroids for a collision or something.

What do you guys think? I'm not saying green, 3-headed aliens are watching us. But perhaps that's how life works?
you can't create evolution, it's a natural process. I think I did cover that idea slightly in my dissertation, I'll have a look and get back to this thread.

i do take issue with the science can't tell us how or why though, we've got some good possibilities for how, and as for why - that suggests a reason for life existing, and given we are just an combination of chemical reactions, it seems that **** happens is a fair answer to why.
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Jjj90
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(Original post by serebro)
I'm not much a scientist, but here goes. Couldn't find the most suitable sub-forum, so linked it with religion/philosophy.

OK, so the sun is warming up and eventually going to engulf Mercury and Venus. That will make life on Earth impossible due to extreme temperatures, no water and a complete mess up of the atmosphere. How could life survive this?

It's rather Sci-Fi but people have suggested we move to another planet, either in the solar system or elsewhere. Another possibility is putting cellular life onto different planets, and allowing evolution to take place.

This has got me wondering, is that how we came to be? Science tells us where we started off and then how we evolved over many years, but it cannot explain how or why it began. Did advanced extra-terrestrials realise that their own planet was going to be destroyed by their sun and then launched a plan to 'colonise' planets with resistant, basic life forms. They might have even created evolution, to increase the chances of future survival. They might have been able to terraform planets, but they could have genetically engineered life and then attached it asteroids for a collision or something.

What do you guys think? I'm not saying green, 3-headed aliens are watching us. But perhaps that's how life works?
Our very existence proves that life must have began somewhere... then why not here on planet Earth? If we presume that we are the spawn of extraterrestrials that merely pushes the riddle of life back further. We do not know where the original bacteria came from, but the notion that it was carried here consciously by an advanced civilization is no more plausible than presuming that it somehow came into existence here on Earth entirely naturally.

With regards to extraterrestrials the greater likelihood is that the original bacteria from which we evolved was carried here following some sort of cosmic event that spewed that bacteria across the universe, perhaps on a comet. That is much more plausible than sentient intervention but again... why is it more likely that bacteria originally formed elsewhere and traveled here, rather than that it came into existence here on earth?

My feeling is that no extraterrestrial civilization has ever traveled here in any shape or form. But perhaps we have been highlighted as a planet that could theoretically harbor life by some distant galactic civilization - just as we have identified the likes of Kepler186F as potentially habitable.
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Farm_Ecology
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(Original post by serebro)
This has got me wondering, is that how we came to be? Science tells us where we started off and then how we evolved over many years, but it cannot explain how or why it began. Did advanced extra-terrestrials realise that their own planet was going to be destroyed by their sun and then launched a plan to 'colonise' planets with resistant, basic life forms. They might have even created evolution, to increase the chances of future survival. They might have been able to terraform planets, but they could have genetically engineered life and then attached it asteroids for a collision or something.

What do you guys think? I'm not saying green, 3-headed aliens are watching us. But perhaps that's how life works?
"but.."
"might..."
"could have..."

You're just throwing out random possibilities, there is literally no reason to even suspect this would be the case, and plenty of reasons to believe it didn't.
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Stiff Little Fingers
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(Original post by Stiff Little Fingers)
I think I did cover that idea slightly in my dissertation, I'll have a look and get back to this thread.
Sort of.
Given we can see the process of evolution through the fossil record, we know that for life to have come from other planets, it must have been very simple originally. So the major problems I covered:

- RNA is prone to spontaneous degradation under heat and radiation [1], which makes distant travel (from another solar system) difficult, the temperature sensitivity making Mercury an unlikely spot. So we look to Mars.
- Martian meteorite ALH84001 contained some abundant polycyclic aromatic hydrocarbons, indigenous to the meteorite, as well as carbonate globules akin to those produced by bacteria, [2] which would suggest bacteria once present there - but the highest temperature life has been observed to survive at (discounting Tardigrades going into a suspended animation like state) is 80-110 degrees celsius [3], so formation above that point would be unlikely to be from living organisms. The temperature of formation is not certain, some suggest sub-100 degrees C, some suggest >650 degrees C [4].

So, with such doubt, calling the carbonate globules the products of life is a stretch, and with the dubious nature of the few "fossils" we've found from other planets, until further fossils are discovered, panspermia is a bit of a pipe-dream.




[1] Goodhead, D.T., Initial Events in the Cellular Effects of Ionizing Radiations: Clustered Damage in DNA, Int. J. Rad. Biol., 1994, Vol. 65, Issue 1, pp 7-17
[2] E.K. Gibson, Jr, D.S. McKay, K.L. Thomas-Keprta et al., Search for Past Life on Mars: Possible Relic Biogenic Activity in Martian Meteorite ALH84001, Science, 1996, Vol. 273, Issue. 5277, pp 924-930
[3] Stetter, K.O., Hyperthermophylic procaryotes, FEMS Microbiol. Rev., 1996, vol. 18, Issue 2-3, pp 149–158.
[4] Harvey, R.P., McSween Jr, H.Y., A possible high-temperature origin for the carbonates in the Martian meteorite ALH84001, Nature, 1996, Vol 382, pp 49-51
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Jjj90
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(Original post by Farm_Ecology)
"but.."
"might..."
"could have..."

You're just throwing out random possibilities, there is literally no reason to even suspect this would be the case, and plenty of reasons to believe it didn't.
The "might's" and "could have's" are what make cosmology so immensely interesting. Although what the OP is suggesting is unlikely, to completely dismiss it is wrong in my opinion. The truth is that we do not know what happened.
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DErasmus
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are u mad

wat are u smoking

extra-terrestrial weed?
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Shabalala
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there is more science and reason in the Quran, The Bible and Lord of the Rings than their is in your "scientific theory"
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KeepYourChinUp
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(Original post by serebro)
I'm not much a scientist, but here goes. Couldn't find the most suitable sub-forum, so linked it with religion/philosophy.

OK, so the sun is warming up and eventually going to engulf Mercury and Venus. That will make life on Earth impossible due to extreme temperatures, no water and a complete mess up of the atmosphere. How could life survive this?

It's rather Sci-Fi but people have suggested we move to another planet, either in the solar system or elsewhere. Another possibility is putting cellular life onto different planets, and allowing evolution to take place.

This has got me wondering, is that how we came to be? Science tells us where we started off and then how we evolved over many years, but it cannot explain how or why it began. Did advanced extra-terrestrials realise that their own planet was going to be destroyed by their sun and then launched a plan to 'colonise' planets with resistant, basic life forms. They might have even created evolution, to increase the chances of future survival. They might have been able to terraform planets, but they could have genetically engineered life and then attached it asteroids for a collision or something.

What do you guys think? I'm not saying green, 3-headed aliens are watching us. But perhaps that's how life works?
It certainly wouldn't be the strangest way life could have come about but then it begs the question, how did that alien life start? So we've just replacing a problem with another even more complicated problem because we can't even observe the aliens. It's like the universe / god argument. We don't even know how the universe came to be and people are trying to introduce another variable which is even more complicated than the first.

In my opinion anything is possible but it's unlikely seeing as we have a very strong documented tree of evolution and we know that life at that time wasn't smart enough to have been the seeds of super advanced aliens. I suspect in the future, when Earths existence is hanging in the balance, if we still have not moved from this planet then we'll most likely start trying to seed other planets with our species, similar to what you saw in the movie "man of steel" but obviously that is only sci-fi so who knows what the future will or won't bring.
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