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In other words there could be a billion planets like Earth but if they haven't passed through a point where they had the right substances in the right conditions at the right time, then they will be barren.
We may have been given a jump start by Aliens in past, too many discrepancies in our far distant past indicates so. At the end of the day who really knows how our ancient ancestors built pyramids etc on different continents yet having such advanced knowledge of the stars.
I personally feel there's something not quite right with our history timelines ... not just the pyramids but some other stuff too that's been discovered and doesn't for the accepted timeline
I think they dropped the ball there.
The strange thing about the big pyramid is if you consider the weight of some of the large blocks then the length of the ramp required to get those blocks up there it kind of turns into the rocket equation, with the ramps length equivalent to the rockets fuel. So you end up with the ramp consuming more material than the pyramid you are building with it.
Also some of those precision cuts on the granite boxes, just look at one .... it looks like it's been factory cut on a machine. This is one of the hardest materials to cut and yet here it is, cut to perfection by people living 4000 years ago who hadn't invented the wheel yet.
i wouldn't go as far as aliens and such but I think our timeline of technology is a little off and it's possible some civilisations had worked out how to harness simple powers like steam and focussed solar. With no internet, no phones, no newspapers and no means of crossing the oceans or deserts there could have been huge differences between what one large tribe knew compared to another. Then disease or some other tragedy strikes and certain things are lost.
The fact that we aren't quite sure exactly how it happened yet doesn't mean it was unlikely or a once-off, it just means that we humans haven't figured it out yet. It stands alongside a vast number of other scientific questions we don't have answers for either. (Yet.)
We haven't figured out how Platypuses make babies yet either - we have a vague idea but despite a century of research we still don't understand how the egg becomes either male or female. Does this mean that Platypus sex selection is near-impossible and could only ever happen once in all the billions of years the Earth has been here? No, it just means we haven't figured it out yet.
The fact that I don't know how to do calculus doesn't mean that calculus doesn't exist, it just means I haven't learned how to do it yet.
Whether there is something like us out there or not, I think the chances of us meeting it are zero.
Scaled down to help, we are discussing what is going on in Australia when we've never been further than shifting our arses 0.5mm on the sofa and the only information we have is what we can see through a dirty pair of binoculars.
Statistically, it's extremely unlikely that we are the only 'intelligent' life in the cosmos, but unless other life has managed to overcome the seemingly impenetrable problem of travelling millions of light-years in fewer than millions of years, they've never visited. Besides, imagine travelling such impossible distances then deciding not to make contact? Seems a bit pointless, going all that way to study a vastly inferior civilisation. It would be like walking all the way to Margate.
Here are examples of the "set of requirements" I mentioned earlier:
- For prebiotic life to begin, a powerful energy source is required. Energy from the Sun alone is not enough to break down inorganic compounds such as nitrogen (N2), carbon dioxide (CO2) and water (H2O) and convert them to complex organic molecules. However, a natural nuclear reactor would provide more than enough energy to drive the required reactions.- A supply of major elements is another condition for the formation of life, as most organisms on earth are made up of carbon, hydrogen, oxygen and nitrogen. The early Earth crust, along with the atmosphere and ocean, can supply these.- As well as the elements that form the building blocks of organic compounds, there must also be a ready supply of the nutrients that sustain life. The nutrient source on early Hadean Earth would have been the rocks on the Earth’s surface, which were rich in iron and phosphorus as well as rarer elements like potassium and uranium.
- A high concentration of gases containing compounds such as ammonia and methane is another key requirement. An enclosed space, such as an underground chamber occurring in the plumbing of a nuclear geyser, would collect a sufficient concentration of these gasses.- Dry-wet cycles are another essential environmental condition for the emergence of life. Alternating between hydration and dehydration can generate more complex organic molecules from amino acids, such as RNA.- Water must be clean and non-toxic. The early oceans were highly acidic and very salty, and life would not have emerged nor survived here. This suggests that life would have formed in a watery environment on land, such as pool or wetland.- Water must also be poor in sodium and rich in potassium. We know this as modern cells contain little sodium, suggesting that life formed in an environment where this was relatively unavailable.- A cycle between day and night is another vital condition for the birth of life. Day-night cycles allow variations in temperature, with low and high temperatures driving different types of reactions, and encouraging self-replication of DNA sequences.- Finally, a diverse environment is necessary to emerge life. Variations in pH, salinity and temperature will help to drive different types of reactions, leading to more complex and varying organic molecules. Diverse environments would occur across the Earth’s landmass through plate tectonics, but not within its oceans.
Ian
Lowering my expectations has succeeded beyond my wildest dreams.