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Aliens & UFOs
The Extreme Scarcity of Life in the Universe
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<blockquote data-quote="Num7" data-source="post: 257405" data-attributes="member: 1"><p>Let's talk about how big the universe is before we get started. It is huge, beyond comprehension. </p><p></p><p>Hypothetically speaking, even if there were 1 trillion civilizations evenly distributed throughout the observable universe only... Well, they'd still be roughly, on average, 7 million light-years away from each other.</p><p></p><p>As you can imagine: Life is more than likely quite rare. Perhaps extremely rare. So there are far, far fewer than 1 trillion civilizations in the observable universe. That means they're probably separated by unfathomable distances. 100 million light-years? Billions? </p><p></p><p>Now that we’ve established that distance and scarcity are two immense challenges in finding traces of other civilizations, let's dig deeper and add time to the equation. </p><p></p><p>Bear with me, here. What if life is so extraordinarily rare that there has never been more than one sentient civilization at a time in the whole universe? </p><p></p><p>If so, how far apart in time are these few, rare civilizations? A couple of thousands of years? Millions of years? </p><p></p><p>Think about how little traces of an advanced civilization would be left after 10 or 20 thousand years. Let alone after 1 or 2 million years... Let alone 100 million... </p><p></p><p>Does this mean that even if we someday achieved instantaneous space travel and could explore 100% of the universe in its present state… We still wouldn't be able to find evidence of other civilizations because they existed too far in the past? </p><p></p><p>In other words, sentient species would be so rare and few, that once one rises, all traces of other previous ones would be long gone (millions or billions of years) and impossible to find anymore. </p><p></p><p>My head is spinning! That would suggest that not only are such sentient races separated by vast amounts of space... But maybe they're also separated by vast amounts of time.</p><p></p><p>What do you think?</p></blockquote><p></p>
[QUOTE="Num7, post: 257405, member: 1"] Let's talk about how big the universe is before we get started. It is huge, beyond comprehension. Hypothetically speaking, even if there were 1 trillion civilizations evenly distributed throughout the observable universe only... Well, they'd still be roughly, on average, 7 million light-years away from each other. As you can imagine: Life is more than likely quite rare. Perhaps extremely rare. So there are far, far fewer than 1 trillion civilizations in the observable universe. That means they're probably separated by unfathomable distances. 100 million light-years? Billions? Now that we’ve established that distance and scarcity are two immense challenges in finding traces of other civilizations, let's dig deeper and add time to the equation. Bear with me, here. What if life is so extraordinarily rare that there has never been more than one sentient civilization at a time in the whole universe? If so, how far apart in time are these few, rare civilizations? A couple of thousands of years? Millions of years? Think about how little traces of an advanced civilization would be left after 10 or 20 thousand years. Let alone after 1 or 2 million years... Let alone 100 million... Does this mean that even if we someday achieved instantaneous space travel and could explore 100% of the universe in its present state… We still wouldn't be able to find evidence of other civilizations because they existed too far in the past? In other words, sentient species would be so rare and few, that once one rises, all traces of other previous ones would be long gone (millions or billions of years) and impossible to find anymore. My head is spinning! That would suggest that not only are such sentient races separated by vast amounts of space... But maybe they're also separated by vast amounts of time. What do you think? [/QUOTE]
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