I never got this:
If there was life on Mars, another planet, or, a very, very, far away Galaxy - how is the book of Genesis consistent when it comes to that? What if this 'life' were either humanoid and/or very hard to distinguish from humans.
Keep in mind at this point in time, it would've been greatly impossible for Adam and Eve to know what a human specifically was since the term was invented afterwards, I assume. (If it wasn't - that makes absolutely no sense at all.)
How would this coincide with Genesis?
Since really no one has any proof at this moment of distant life, and, in those days they didn't know the classifications of a human...
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Anyway, to a different tone:
Another error in Genesis (I'm sure this was brought up already), I'm pretty sure it's been proved that the flood didn't happen. There have been trees dating back to 4,000 years old. We wouldn't have fossilized plants, either, older than that.
Methuselah is literally 5,000 years old. The water pressure would've killed it or tore it's roots away by erosion of the dirt.
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Plus it's the whole Bible-diet thing, but, let's not get into that.
You should read the Space Trilogy books by C.S Lewis if the idea of life on other planets and with a connection to Genesis if that interests you.
Personally, I don't have a problem with the thought that God could have created more people in another galaxy if He chose too. Who knows, maybe He did and they are doing a far better job than we are? Maybe Eve didn't eat the forbidden fruit and sin never entered their world? I like to joke though that if there was centuries of people that had avoided eating the fruit, knowing that I have a problem not indulging in curiosity, I would have been the one to eat it!
What do you mean about no proof that the flood happened? The fact that trees only date back 4000 years proves something must have caused all the trees to die at that point? It is estimated that the Flood began approximately 4,359 years ago in the year 1656 AM or 2348 BC. The fact that there are no trees older than this brings great validity to a world wide flood. Also, there are over 200 (I have even heard over 300) flood stories from different cultures around the world. Here is a link to read more:
http://www.talkorigins.org/faqs/flood-myths.html The fact that there are stories with similarities in all these cultures that did not speak to each other should cause at least someone to think that there is validity to it. Also, there are fossils of sea creatures in the middle of Kansas and in the Himilayas. How would sea creatures be at these locations without a flood? Also, if we look at the number of people on the earth there had to be a catastrophic event that happened about 4000 to 4500 years ago too because the population of the earth at the rate of growth per year coincides with this time.