Pre-columbian civilization can be considered advance, because the Native Americans had a very civil and structured way of living before Columbus. They had different but effective technology to farm, and they had there own way of trade. Pre-Columbia was very adapted and organized, before english settlers took over.
don’t know if this is too late but hope this helps :)
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Maybe it's "Since we need light to see, we cannot see black holes".
But in me if make my own evidence i say that black hole can be true if two planets or stars are been crushed together then explode in the universe
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I hope i can help :)
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Sorry. I don't..Try bookstores near you.
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