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Response to greyl (Original post)

Sun Apr 12, 2015, 04:44 AM

3. Distance, evolution and time

 

Other civilizations may have existed and will probably exist but at different times because they evolve(d) differently. There is no law of the universe that says civilizations have to exist at the same time or even use the same methods of communication.

Its very possible that while we were grunting and banging rocks and sticks together to make fire, there were other civilizations out there that were where we are today but died out along ago.

When you think about it, our civilization only advanced over the past 100 years to travel to the moon after millions of years of evolution but sadly our current civilization will probably be long gone in about 200 years after a deadly disease is released, due to nuclear warfare or climate modification. On the other hand other species on our own planet will continue to evolve as will other civilizations in other galaxies.

The reality is finding another civilization co-existing within reach at the same time is slim to none let alone finding one that can travel the universe in a short amount of time over a great distance.

Just to give you an idea, it took our most distant probe voyager 1 nearly 40 earth years to travel about 37 light minutes or 0.00206489893 light years from earth and it will take 40,000 years to travel just 2 light years, our nearest star Alpha Centauri is 4.367 light years away and our own radio waves have only covered a tiny speck of the milky way galaxy since radio waves were first discovered by humans in 1895.

There are an estimated 170 billion other galaxies out there in the observable universe but we haven't fully breached our own solar system using probes and we've only made less than a %1 presence in own galaxy when it comes to radio waves and by the time our signals are discovered, we will be long gone.

Ultimately if we are to make meaningful contact within our short lives it have to be with a civilization so evolved and advanced that it will be able to travel or communicate great distances in a short amount of time (ie light years in a matter of earth minutes) but we also have to remember that we only evolved very recently to discover radio waves, who is to say that there aren't other methods of communication that we just haven't discovered yet?

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