Page 5 - Aliens or no Aliens?

Funny, I saw the thread name and said, "aw, hell, no! Tell me someone didn't resurrect that thread again!"

Chilly-- half cast?

look at it this way:

100,000,000,000 stars in our galaxy (an estimated number). and the estimated number of galaxies in the visible universe is around 200,000,000,000. this gives you (roughly...) 2x10 22 stars. take it that, say, 85% of those have planitary systems... and then say that 0.1% of that could possible have supported some sort of life... and you have this number of inhabitable solar systems in the visible galaxy:

17000000000000000000

and to say that we are the ONLY planet capable of supporting life is absolute bull!!

sure, there may be no othe rplanets with an Oxygen Nitrogen atmosphere, heapes of water and just enough heat to support our form of life, but that doesn't eman life can't evolve in some other way.

Damn I cant give you any rep either Anubis....and I strongly agree with you!

Thats roughly how I see it (except for the clever arithmatic part as I'm too lazy to work it out).

Yeah Dngrsone. You look half-cast to me. Maybe your just tanned Never mind.

Yep theirs definatly life form of somesort out there. It just needs the right conditions.

And if not now their definatly has or will be lifeform when planets move into a certain location where the sun moon etc create the right conditions.

the universe has t be older than that.......i m not a big fan of the bigbang theory
my last post wasnt the first post i posted.ive been registered on here b4 i forgot my name........

You must have saw StarWars, whos to say there are not planets out there with several suns & moons and meet the criteria needed for their particular life form.

Millions of ET's relatives flying around in their little ships trying to find Earth so they can re-claim the cost of the collect call he made in the 80's.

whose to say that the right condition for some form of alienlife isnt found on planets like murcury or pluto...

I've not watched any starwars appart from the latest one. It was good. But i'm no big fan or anything.

But yeah what you said makes sense. But i was thinking about this a while back......Here goes.

Nature can adapt to what ever you throw at it. For example
If a couple lived in a pool of water all their life, and had children and they lived in it too, and on and on over many years, the body would adapt with giving them webbed feet etc.

It would be a very slow process, but eventually it would occur. Also humans breathe oxygen and to counter this plants breathe carbon dioxide.

This keeps a steady supply of both. So in theory couldn't life be nurtured in any environment. E.G an atmostphere of hydrogen? Nature will just somehow create life that breathes this?

I hear you and I like your reasoning but im not too sure about hydrogen part. Yes we require air, heat, water & food to survive and the theory that other lifeforms may not need the same conditions is very interesting, and one which I believe true.

You are only seeing a tiny portion of the equation, the Darwinian "natural selection" evolution, which is (in my mind) a long-term tweaking of a species/genome.

Evolution happens a lot faster than Darwin's random mutation would allow for-- there is code in there that executes under certain conditions; threat of extinction, perhaps, or existence of an open niche; that causes a rapid change in the genome... instant speciation.

Of course, it's a radical and largely unproven theory, but in time the truth will out. Darwinian mechanics may have been the thing for the first billion years of life, when everything was single-celled or simple multi-celled organisms, but then the aforementioned code developed and with it the Cambrian Explosion and life hasn't been the same since.

Now, if there's a niche, it will be filled... got an island with nothing but herbivores? Let a few hundred or a thousand years go by and now you have carnivores to regulate that population.

Let us not forget that organisms do not exist in a vacuum... they shape their environment as the environment shapes them... the oxygen we breathe was a waste product of early plants... the other organisms that existed at the time had to adapt to survive the poisonous O2 levels, some remnants of these ancient lines survive near volcanic vents in the ocean bed, where they process sulphurs and methane-- gases that were predominant in the early Earths atmosphere. Predators and prey influence the development of each other (this goes for plant life as well), it isn't so much evolution of the species as it is evolution of the ecosystem.

Dang, Willy, you got me on a rant... how long has it been since I did that last?

only our version of life.

life itself can begin anywhere. look at where life developed on earth... an oxygen less environment with little light. life changed earth into what it is today. and because of that, other types of life (ours for instance) were able to develop. plants used CO2 and gave out oxygen, which started to mess with the atmosphere and could have killed the plants if we hadn't developed.

also, think about how odd sea creatures apear to us. there are even worms that live on the sea bed, next to volcanic vents... 1000*c + temps at one end, and very low temps at the other end. they don't have light, nutrients, or anything like that. but they are proof that life will make use of what it can get.

o, for anyone interested read: "A Short history of Nearly Everything". Amazon has it.

it is THE book for a science student or enthusiast. and should be the core text for every science syllabus (and Mr. Bryson recently donated a copy to the science department of every school in the UK).

I guess Anubis is my translator now

o and we couldn't develop to live off hydrogen. our cells and DNA are too dependant on our current way of life... we depend on a parasitical bacteria (the mitochondria in all our cells) to get energy from oxygen. we can not live another way. but other life could adapt...

bacteria on the other hand evolve all the time, and if the world was suddenly enveloped in hydrogen {couldn't think of a better word for it really...} then there would be bacteria that would survive, adapt, thrive, evolve and start the whole ting over again.

sorry about the double post

EDIT: damn it!!
i just got so cough up in replying to chilly.

I never said that we could adapt to use hydrogen. But like we have always breathed air. Another lifeform somewhere else could breate hydrogen. It's just an example really.
But what you said's true. I just didn't say that.

You can't really reply to chillies!