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Member of the Church of the Holy Glenn McGrath
"How about you do something contstructive in this forum for once and not fill the forum with ****. You offer nothing." - theegyptian.
Hows the mushroom cloud work?
Everyone wants to change the world, noone wants to change himself.
I remember reading a newspaper article about another planet with oxygen (tabloid newspaper I must warn)
Anyway, for a planet to have oxygen it must have plants which breath out oxygen, and breath in Carbon Dioxide. Now then, animals obviously breath in oxygen and breath out Carbon Dioxide. That's is what I've been taught in school
Here's some simple equations:
Plant/s + Animal/s= Oxygen on planet
Plant/s die = Animals die and no oxygen on planet.
Unless if there's another way how the oxygen have gotten there, I think that's a massive peice of evidence
You realise that there was no oxygen on Earth at one stage?
On Earth, oxygen is the result of life. It does not follow, however, that it must be the same on every planet. When it comes to life, we only have one example to go by (Earth life). And a sample of one is bad statistics.
I'm as excited as anyone if this is indeed true (I doubt it), but its nothing to get your hopes up about. It's amazingly difficult to even detect the planets, let alone figure out their atmospheric makeup. The more exciting question is that of intelligent life. Most likely there is life on other planets, but I am not sure how much life exists above the unicellular level. Putting my own guesses in the Drake Equation, I come out to something like 1-2 species in the galaxy at any given time that are capable of communicating with us. Considering the diameter of the milky way galaxy is 100,000 light years, it is likely that even if they somehow knew our location and sent a message, we would be extinct before that message got here, and if we were not and we actually managed to recognize the message and send a reply, that they would be extinct before our message got to them. Especially as the whole Detect -> Send -> Receive -> Reply loop could take hundreds of thousands of years, and it is unlikely that any civilization would be sitting around able to listen to radio waves for that long.
The second argument against us ever detecting intelligent life is simple: 'Why are they not everywhere?' If intelligent life were common, and assuming they followed the path of life on earth (not an assumption we can make), then they would need to expand to keep up with the resources. Considering the Universe is 12 billion or so years old, you'd think someone would have figured out star travel by now, and once they do, it's only a matter of several million years before they would be able to spread through the entire galaxy. Once you've spread throughout the galaxy, it is unlikely that any single event can wipe out an entire species. Of course, there could be cleansing events such as supernovas that would cleanse everything in the local region, not allowing any life to get above the cellular level and wiping out everyone that does every hundred million years or so, and acting as a 'reset' button, like Stephen Baxter wrote about, so that could be an explanation.
We've only been looking for a very short time, so nothing is yet certain, but its something to think about. Of course all this is built upon assumption, not the least of which is that it is impossible to travel or communicate at a speed that is faster than the speed of light. If this is not true, then all bets are off. But then, that's even more reason for a civilization to have spread throughout the galaxy, and none has as of yet (as far as we can tell).
Last edited by silentstriker; 22-07-2008 at 07:44 AM.
It's worth bearing in mind that if intelligent life exists elsewhere in the universe then there is no reason that any civilisation would be as technologically advanced as we are, in fact some would say if there were it would be a huge coincidence.
Personally I believe that there is intelligent life elsewhere in the universe, would strike me as totally illogical if there wasn't, but obviously this may never be verified, certainly not in any of our lifetimes anyway. For me personally the biggest and nearest chance of life exisiting elsewhere in the universe would be the andromeda galaxy, certainly not the milkyway, but again...this is something ulikely to be resolved in our lifetimes.
Of course, in about 2-3 billion years, our galaxy and the Andromeda galaxy will collide - creating one huge galaxy, so then the distinction will be moot.
Titan is probably the best bet in the search for any other type of life in this solar system certainly (that is the moon that has it's own atmosphere isn't it? sorry, i'm a bit of a noob when it comes to this sort of thing).
Whether or not life ever existed on mars is also an intruiging issue, certainly appears that if anything ever was there it's now long gone, but the theory of water once flowing there is an interesting one, and strikes me as being a reasonable idea.
The entire mystery surroundning the univserse saddens me mind you, as it's undeniably the greatest enigma remaining to humankind (unless you count the existance of god I suppose), but yet, chances are if there is any great discovery to be made out there, chances are nobody will ever see it.
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