Godmachine
[H]F Junkie
- Joined
- Apr 7, 2003
- Messages
- 10,472
There is...a lot wrong with this argument.
First off, the odds of any alien species being DNA-based is...well, basically nonexistent. Sure, somewhere out there, maybe, life may have, indeed, evolved EXACTLY as it did on Earth. But the odds of us meeting those 'evolved identically to us' races are pretty much nill.
So any race we run into will...sure...have diseases and such. But they will almost certainly be totally genetically incompatible with us and not be able to make heads or tails of our genetic structure so as to infect us. Their equivalent of 'viruses', anyway, will be absolutely and totally harmless to us. Their bacteria? Sure, maybe a risk...maybe. Wash your hands, though, you'll be fine.
As to water...where did that come from? Of course they won't be here for that.
However, you'll note we do have a planet in the right distance from the sun whereby water is liquid. Venus, arguably (maybe, with sufficient terraforming) and Mars also COULD hold liquid water. So that's really the issue. Territory! Same as North America to the Europeans...wasn't the water they came for. Or the food. Or the view. It was land.
And that's the problem. What can Earth hold, 10 billion inhabitants? 20 billion, if uncomplaining? Presumably, across our solar system (Venus, Mars, a few moons maybe) 100 billion total? That seems a pretty big chunk of 'habitable space' that you only need to get rid of this one backwards, trivial, hairless-monkey-race to have all for yourself...
Your taking a lot of liberties and using many assumptions and not using a lot of grounded science. Again as I've stated , its very unlikely even considering our planet's butter zone. We have no idea how rare our planet may be because we've only survey'd around 2,000+ exoplanets. You do realize that we've founded planets around every type of star configuration just about and that would mean if even there were 2-3 planets for each star that would equal nearly half a trillion planets alone in our galaxy..
As far as your odds of a "alien" species having a similar base code like DNA , why is that so unlikely? The most common elements in the entire Universe are what we are made of .. right off the top 5 , that would mathematically speaking the odds of an alien race having a similar genetic structure are VERY likely. I don't think we're going to find configurations using much of the remaining elements that are common through the Universe. How do I come to this conclusion? Because instead of relying on pure fantasy to guide the possibilities I'm hedging my bets on what science seems to point towards as Universal Evolution.
Right now our knowledge of exoplanets is what really is guiding us and we've only surveyed around 2,200 and cataloged all of them. That's a fraction of a fraction of a fraction of a fraction of the total number of planets that exist in this galaxy alone. Making broad assumptions that the big scary aliens are coming to stomp us out of existence for a little bit of water and semi-stable atmosphere is more fantasy and less grounded science. Now is science always correct? No its not , science is ONLY best guess and that's all its ever been. Based on that theory I do not think Earth is so incredibly special with its conditions , I personally believe that we will find another Earth with liquid water and all sooner rather than later and even after we do , there will still be hundreds of billions of more planets to keep checking out.