At 7/18/08 07:09 AM, poxpower wrote:
At 7/18/08 06:42 AM, cellardoor6 wrote:
Unless they become so advanced that they create gravity drives.
Right but then they would be here by now.
How did you come to that conclusion so confidently? How would the existence of interstellar/intergalactic travel automatically mean that whoever/whatever had it would be here by now?
You're not thinking about all the possibilities... maybe it just got invented recently? What if the creatures who developed it have no desire to come in contact with others? What if the universe is so huge that even trillions of alien civilizations all with intergalactic travel could travel forever and ever and never come in contact with anyone else? There's a whole host of possibilities that you're not even trying to consider.
However for all you know they could have already come here, they could be here right now. You can't say "if there were aliens who could do this, we'd know about them, therefore it's not true".
I'm not saying that there HAS to be aliens. I'm not saying that they definitely have the ability to travel here from across the galaxy/universe, I'm just saying that it's very possible. Suggesting it's impossible and summing it all up as "this means this, therefore it doesn't exist" is depressingly narrow-minded.
I'm just saying his conclusion is stupid since there's way too many things we don't know about the universe yet to say what the chances are of them getting here by now are.
And given how little we know about the universe, how small we are... it's stupid to suggest that there are no aliens, and that there can't be aliens just because we don't have direct knowledge of them.
One thing I heard a lot from scientists is that it's most likely impossible for humans to ever go faster than the speed of light
According to the laws of physics, it is impossible to travel faster than the speed of light within the 3 spatial dimensions and the half dimension of time we exist in (for us, time is only a half-dimension because it can only go forward). But there are ways of getting around it, as I mentioned. If gravity-drives and rips in spacetime were created, something or someone wouldn't have to go faster than the speed of light to get somewhere in an amount of time that would normally require speeds exceeding lightspeed.
Think of it this way:
Say that you're in a two-story building. You're on one side of the house, and on the other side is a stairway. You want to get to the room below you in say... 5 seconds. Normally to get to that room you'd have to run all the way across 2nd floor, down the stairs, and across the bottom floor... basically running the length of the building twice, plus the steps of the stairs. This would be impossible to do in 5 seconds. The only way to get to the room below you in that time would be to go through the floor. If you had the tools to cut a hole in the floor, you'd have the ability to do something that in normal circumstances would be physically impossible.
Think about it, you wouldn't need to go the speed that would normally be required but is impossible, because you mitigated distance and speed limitation as obstacles. You circumvented the laws of the universe in your own tiny, little way.
Now, humans know that if the technology was there, this kind of travel in the universe would be possible. We know that teleportation exists in the universe and is not impossible, we've done it at the subatomic scale. If we advance enough, we can negate the laws of physics as limitations further. Instead of having to travel the spatial distance from our point of departure to our destination, we could cut a hole in spacetime, travel through at a leisurely speed, and appear possibly millions of light-years away in a short trip.
Now, your argument against this can be countered by my former analogy about cutting a hole in a floor. You're basically arguing that since it's not possible for us right now to bend spacetime and create rips in the proverbial floor of the universe big enough for us to squeeze through, it never will be possible. This is tantamount to a caveman saying that it's impossible for someone to cut through the floor and drop below, when his understanding of the universe is limited to fucking, pooping and poking big scary monsters with sharp sticks. The caveman has no understanding of what an electric saw is, just as you and I (and humans as a whole) don't have understanding of whatever future technology may be developed to rip holes through the the fabric of space-time.
Like you hear about wormholes and all that, but that's shit that can only send like one light particle back 5 seconds in time.
But we know now, for a fact, that teleportation is not impossible. We don't know if we'll ever be able to apply it at the scale required to travel the universe, but we know that there is some way to do it. We know it can be done, we just don't know how to do it.
So I'm pretty skeptical, but hey if it ever works out, cool.
Anyways, we know there's no aliens here now
That sounds a whole lot like something an alien would say...
Pox...
LOL
They've been looking for signals with that SETI thing for over 30 years now and they haven't found anything, so yeah it doesn't bode well.
Are you aware of how GIGANTIC the universe is? Some scientists believe that the universe doesn't even have a finite size, there is no end and never will be an end to it. The visible universe to us, as large as it is, is only an infinitesimally small part of it all.
It's not surprising at all that we haven't found something in 30 years.
Allow me use yet another brilliant analogy:
I looked for Green Curry paste in my local supermarket today. I couldn't find it in the 10 minutes I was there. According to you, my inability to find Green Curry paste doesn't bode well for the existence of Thai food in the universe.