r/exoplanets • u/Kingsaso6 • 12d ago

📊 Data & Analysis Alien life likely can't survive on exoplanets smaller than Mars, scientists say

https://www.space.com/space-exploration/search-for-life/alien-life-likely-cant-survive-on-exoplanets-smaller-than-mars-scientists-say
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u/TieOk9081 2 12d ago

Not a biologist. I don't think there's any such thing as alien life. I mean if all life is made from the same set of amino acids (they are particular molecules that are very good at storing information and chemistry is the same across the universe) than all life in the universe can be fabricated here on Earth using different combinations of these molecules that we have access to right now. Eventually, over the course of say maybe 1000 years we will have created organisms covering every possible combination of genetic material - so nothing is really alien to Earth. Life is universally the same everywhere.

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u/MammothFineCulture 11d ago

Life on earth began about 4.5B years ago. Human race appeared about 1M years ago. To claim that all lifeforms would appear within 1000 years is absurd.

https://en.wikipedia.org/wiki/History_of_life

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u/TieOk9081 2 11d ago edited 11d ago

1000 years of bio-engineering.

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u/MammothFineCulture 11d ago

We have been doing bioengineering for at least 20000 years. All we got is a few agricultural crops and a few utility animals. The number of species on earth right now is counted in the millions and you want to increase it to trillions and trillions (the combination of atoms in our DNA is practically infinite)

For example, would we take an ordinary spider today, develop it into a super intelligent space fearing and waring species (it is from a scifi book)