| RenCutypoison said: Depends on what you call life. Non DNA based self conscious entities probably exists. Probably not based on carbon either. |
CHNOPS (Carbon, Hydrogen, Nitrogen, Oxygen, Phosphoros) based life is the most probable type, not only due to its abundance in the universe, but also the chemical compounds it makes. Other mixes not based on this carbon based organic chemistry are far less likely to exist.
That does not mean that life will have evolved in any sort of complimentary fashion. Amino acids sequences, the chiralities (handedness) of the organic molecules and so forth are likley different. There is considerable variety in DNA forms here on earth (A, B, Z) and a huge diversity of protien solutions to chemical problems.
DNA and histone protein complexes with the various forms of RNA are a great solution to information storage/replication. Any complex life will have evolved a similar solution.
The chemistry that gave rise to life on earth is possible in many other places in the universe... so almost certainly there is life in some form elsewhere.
I have advanced degrees in Biology and Earth Sciences... and I have no reason to doubt the existence of complex life elsewhere in the universe.
I am however quite certain that there is a distinct shortage of hot green women with compatible genitailia. I also have little reason to believe they visit here often(ever) and anally probe random people.
