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Originally posted by LifeInDeath
Could humans have evolved independently on another world, ones who are genetically the same or at least similar enough to breed with us? No. That would be a case of "convergent evolution," and that simply doesn't happen. It's just a law of nature. Variance in the genome always increases over time, it never decreases/converges.
A more plausible scenario is that someone or something came down to Earth tens of thousands of years ago and took a sample of humans with them and then let them breed, perhaps even did some breeding of them or genetic manipulation in order "uplift" them into sentience (check out the great series of science fiction novels by David Brin called the "Uplift" series, which deals with this sort of thing, the first in the series is called "Sundiver").
In that case, there would be an another line of humans that could have evolved (or been bred) elsewhere in the universe.
Having been raised with and trained by aliens, they'd probably be far more advanced than we are, and given the amount of time, they could well have a fully developed civilization of their own as large or larger as what we have on Earth, or they might be integrated into the alien civilization. Given the time and their technology, they could well span multiple star systems and we, here on Earth, could be more like a tiny group of stone age people on some tiny pacific island somewhere, all but untouched by and ignorant of civilization in the world/universe around them. It's possible that Earth is the mostly forgotten backwater of the Milky Way!
Originally posted by starwarsisreal
Is it possible there are humans existing in another part of the universe besides Earth? I mean if there is life out there maybe humans could exists in that place as well
Originally posted by game over man
I have a serious question
Maybe someone who knows more about space than I can help.
If humans in the future are able to travel to a very distant star in a split second from Earth,
On present Earth today, could we be looking at that star the future humans traveled to with the future humans at the star currently as we are looking from Earth today?
For example Alpha Centauri is 4.37 light years away from our Sun. Say in 100 years humans are able to travel through space via wormhole technology. If humans in the future are able to remove the 4.37 light year handicap and arrive at the planet...
Could we be looking at our future space brothers right now when we look up at the stars in the sky?
Is that possible?
And if it is could the humans come back, but they come back to our time?
edit:
Is it possible, mathematically, to show that future humans are up in the stars currently as we speak.
Originally posted by LifeInDeath
You are thinking about it backwards. When we look at Alpha Centauri now, we are seeing it how it looked 4.3 years in the past, not the future because that's how long it took for the light to get here.
Let's say we were able to jump to Alpha Centauri right now, in an instant, and then when we get there we are able to set up some sort of signal or beacon that sends back a laser or radio signal to Earth. That signal would take 4.3 years to get back to earth, so it would get here around July-ish 2014. Even though we send that signal in the present, nobody back home would know about it until 4.3 years in our future.
For instance, here's a picture of the Sombrero Galaxy (aka M104). That image was taken a few years ago by Hubble, but the image we are seeing there happened about 30 million years ago, as the light from that galaxy has taken that long to reach us here. Whatever civilizations in that massive galaxy which might have been looking our way at the time the light in that photo actually happened, existed almost halfway back to the time of the dinosaurs...and whatever light they were looking at from our galaxy happened a little after the dinosaurs died out, because the light from out galaxy also takes 30 million years to reach them!
Originally posted by game over manOk, so the Sombrero Galaxy, what we observe in present time from our planet is the Sombrero Galaxy 30 million years ago. Does that mean if we travel there via wormhole technology we would end up there 30 million years ago? Or would we end up there at the current age of that Galaxy?
Originally posted by game over manOk, so the Sombrero Galaxy, what we observe in present time from our planet is the Sombrero Galaxy 30 million years ago. Does that mean if we travel there via wormhole technology we would end up there 30 million years ago? Or would we end up there at the current age of that Galaxy?
Originally posted by LifeInDeath
If we instantly jumped there via a wormhole, we would get there as it is now, not as it was 30 million years ago.