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Is Time Travel (going backwards) Possible?
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<blockquote data-quote="KarinsDad" data-source="post: 6041255" data-attributes="member: 2011"><p>Until the late 80s when Voyager 2 passed Neptune, the then current scientific theory was that Neptune had very little in the way of winds due to its vast distance from the Sun and lack of solar heat for convection. However, Neptune has the fastest measured winds in the solar system, getting up over 2000 km per hour. Science was fairly advanced in the last 80s. Dark Matter theories had been around for 60 years. Einstein came up with most of his ideas 50 to 85 years earlier. How could scientists be so wrong on something so fundamental so recently?</p><p></p><p>The problem with Dark Energy (and Dark Matter) and some other theories where scientists are using a set of observations to come up with an educated guess, is that it's still pretty much a guess. Yes, these are educated and calculated guesses based on current data, but scientists really don't know yet. Until they do (requiring a lot more data, observation, and calculation), discussing theories like these is fun, but it's probably not going to lead to the actual truth (or at least when lay people such as myself discuss them on a web forum).</p><p></p><p>As an example, some scientists claim that the Large Hadron Collider can recreate conditions during the first few billionths of a second of the Big Bang. Well, maybe it can or maybe it cannot, but since nobody was around during those moments of the Big Bang, there's a chance that these scientists are wrong on this. They were wrong about Neptune. And, maybe scientists have found the Higgs Boson, but then again, even if they call it that, it might not actually be that.</p><p></p><p>Scientists have been searching for Dark Matter for nearly 80 years and still have not found it. Nor has any one set of Dark Matter equations actually worked for every galaxy that they used them on. Maybe part of the stellar attraction in galaxies is due to electromagnetic fields (which also influence at the square of the distance).</p><p></p><p>Dark Energy theory is only a little under 15 years old, so yeah, it's still fairly new. It might be wrong since it is primarily (but not solely) based on one type of observation and there is at least one alternative explanation, but it's still too early to know.</p><p></p><p>Interestly though, a lot of scientists think that the universal expansion is accelerating. Maybe it is. Maybe it isn't. But, we need other verification to be sure. If it isn't accelerating, then we get to throw out the most recent text books on at least part of the Lambda-CDM model.</p><p></p><p>The problem with many of our current theories of the universe are that many of them are built upon earlier theories that aren't necessarily 100% reliable or factual. Knock out one of the earlier ones and the current ones might collapse. For example, prove that the Big Bang never happened and many billions of dollars and lifetimes of research pretty much fall by the wayside.</p></blockquote><p></p>
[QUOTE="KarinsDad, post: 6041255, member: 2011"] Until the late 80s when Voyager 2 passed Neptune, the then current scientific theory was that Neptune had very little in the way of winds due to its vast distance from the Sun and lack of solar heat for convection. However, Neptune has the fastest measured winds in the solar system, getting up over 2000 km per hour. Science was fairly advanced in the last 80s. Dark Matter theories had been around for 60 years. Einstein came up with most of his ideas 50 to 85 years earlier. How could scientists be so wrong on something so fundamental so recently? The problem with Dark Energy (and Dark Matter) and some other theories where scientists are using a set of observations to come up with an educated guess, is that it's still pretty much a guess. Yes, these are educated and calculated guesses based on current data, but scientists really don't know yet. Until they do (requiring a lot more data, observation, and calculation), discussing theories like these is fun, but it's probably not going to lead to the actual truth (or at least when lay people such as myself discuss them on a web forum). As an example, some scientists claim that the Large Hadron Collider can recreate conditions during the first few billionths of a second of the Big Bang. Well, maybe it can or maybe it cannot, but since nobody was around during those moments of the Big Bang, there's a chance that these scientists are wrong on this. They were wrong about Neptune. And, maybe scientists have found the Higgs Boson, but then again, even if they call it that, it might not actually be that. Scientists have been searching for Dark Matter for nearly 80 years and still have not found it. Nor has any one set of Dark Matter equations actually worked for every galaxy that they used them on. Maybe part of the stellar attraction in galaxies is due to electromagnetic fields (which also influence at the square of the distance). Dark Energy theory is only a little under 15 years old, so yeah, it's still fairly new. It might be wrong since it is primarily (but not solely) based on one type of observation and there is at least one alternative explanation, but it's still too early to know. Interestly though, a lot of scientists think that the universal expansion is accelerating. Maybe it is. Maybe it isn't. But, we need other verification to be sure. If it isn't accelerating, then we get to throw out the most recent text books on at least part of the Lambda-CDM model. The problem with many of our current theories of the universe are that many of them are built upon earlier theories that aren't necessarily 100% reliable or factual. Knock out one of the earlier ones and the current ones might collapse. For example, prove that the Big Bang never happened and many billions of dollars and lifetimes of research pretty much fall by the wayside. [/QUOTE]
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