Toepoke Posted April 20, 2017 Share Posted April 20, 2017 I think we got away with it... http://earthsky.org/astronomy-essentials/large-asteroid-2014-jo25-close-april-19-2017-how-to-see Quote Link to comment Share on other sites More sharing options...
EddardStark Posted April 20, 2017 Share Posted April 20, 2017 (edited) 48 minutes ago, Toepoke said: I think we got away with it... http://earthsky.org/astronomy-essentials/large-asteroid-2014-jo25-close-april-19-2017-how-to-see Size of The Rock of Gibraltar apparently. A scientist was on the radio saying that this was was picked up late in the day and we could not have done anything to alter its course if it was going to collide with Earth. Edited April 20, 2017 by EddardStark Quote Link to comment Share on other sites More sharing options...
TDYER63 Posted April 20, 2017 Share Posted April 20, 2017 26 minutes ago, EddardStark said: Size of The Rock of Gibraltar apparently. A scientist was on the radio saying that this was was picked up late in the day and we could not have done anything to alter its course if it was going to collide with Earth. Was it heading for Spain ? Quote Link to comment Share on other sites More sharing options...
Grim Jim Posted April 20, 2017 Share Posted April 20, 2017 Now that we are tracking these near misses, we should be able to do some calculation of how long we have before we get seriously belted. The earth presents a 127.5 million km2 bullseye. Let us say a near miss is within 2 million km, so I think that means 1 in 100,000 flybys will hit earth. How frequently does this happen? Where's Biffer? Acht, have just found this on Wiki... "Every 2,000–3,000 years, objects produce explosions of 10 megatons comparable to the one observed at Tunguska in 1908. Objects with a diameter of 1 km hit the Earth an average of twice every million years. Large collisions with 5 km objects happen approximately once every twenty million years." Quote Link to comment Share on other sites More sharing options...
phart Posted April 20, 2017 Share Posted April 20, 2017 It's not if, it's when. One passed between the moon and earth not that long ago, picked up less than a day before it orbit almost co-incided with ours Quote Link to comment Share on other sites More sharing options...
thplinth Posted April 20, 2017 Share Posted April 20, 2017 (edited) Graham Hancock's last book makes the case that these impacts are much more frequent than we realize. The younger dryays being the last time. I have a horrible feeling he is right and this explains why we are a species with no real memory of our past. The impact acts as a massive reset wiping most of us out and putting us back to the stone age. Reckons it is likely to be linked to the Taurids and Encke which was likely a much bigger comet that disintegrated and which now periodically bombards earth with meteor showers (twice a year I recall but one is during daylight so we don't see it, might even be this time of year). He reckons that every now and then (with approx 14,000 years ago being the last biggie) a much larger fragment (buried undetected) in the stream of fragments hits. Edited April 20, 2017 by thplinth Quote Link to comment Share on other sites More sharing options...
thplinth Posted April 20, 2017 Share Posted April 20, 2017 Tunguska being another linked to the Taurids. If that is correct it is really rather frighteningly frequent. Quote Link to comment Share on other sites More sharing options...
thplinth Posted April 20, 2017 Share Posted April 20, 2017 (edited) And I'll just throw this in here as it is quite interesting... The symbol of the swastika is theorized to come from Encke's break up. "A theory holds that the ancient symbol of the swastika appeared in a variety of cultures across the world at a similar time, and could have been inspired by the appearance of a comet from head on, as the curved jets would be reminiscent of the swastika shape (see Comets and the swastika motif). Comet Encke has sometimes been identified as the comet in question. In their 1982 book Cosmic Serpent (page 155) Victor Clube and Bill Napier reproduce an ancient Chinese catalogue of cometary shapes from the Mawangdui Silk Texts, which includes a swastika-shaped comet, and suggest that some comet drawings were related to the breakup of the progenitor of Encke and the Taurid meteoroid stream. Fred Whipple in his The Mystery of Comets (1985, page 163) points out that Comet Encke's polar axis is only 5 degrees from its orbital plane: such an orientation is ideal to have presented a pinwheel like aspect to our ancestors when Encke was more active." Edited April 20, 2017 by thplinth Quote Link to comment Share on other sites More sharing options...
Toepoke Posted April 20, 2017 Author Share Posted April 20, 2017 11 hours ago, thplinth said: Graham Hancock's last book makes the case that these impacts are much more frequent than we realize. The younger dryays being the last time. I have a horrible feeling he is right and this explains why we are a species with no real memory of our past. Interesting. So was he suggesting that advanced civilisations had been wiped out by meteor impacts? Quote Link to comment Share on other sites More sharing options...
thplinth Posted April 20, 2017 Share Posted April 20, 2017 16 minutes ago, Toepoke said: Interesting. So was he suggesting that advanced civilisations had been wiped out by meteor impacts? I think so but only the last one really. (the one we cant recall) How could you say any further back than that? It goes far beyond human history. Quote Link to comment Share on other sites More sharing options...
phart Posted April 20, 2017 Share Posted April 20, 2017 29 minutes ago, Toepoke said: Interesting. So was he suggesting that advanced civilisations had been wiped out by meteor impacts? Yeah not super advanced, but more advanced than we've been led on to believe, that's why there is all these sites with amazing detail that also line up astronomically, which suggests a decent level of technological advancement. As opposed to more advanced than us in every way type of scenario. Quote Link to comment Share on other sites More sharing options...
Ally Bongo Posted April 20, 2017 Share Posted April 20, 2017 (edited) Unless we discover a dinosaur flag i'm not buying it Geology would give us some sort of trace IMO Asteroid strikes do not wipe out everything If one was to strike now there are a few deep underground survival shelters already built so some wealthy humans would survive Edited April 20, 2017 by Ally Bongo Quote Link to comment Share on other sites More sharing options...
phart Posted April 20, 2017 Share Posted April 20, 2017 You could read a bit before making a judgement lol, not sure how you could possibly make a reasoned decision 15 minutes after hearing about it. Quote Link to comment Share on other sites More sharing options...
phart Posted April 20, 2017 Share Posted April 20, 2017 (edited) Göbekli Tepe is regarded as an archaeological discovery of the greatest importance since it could profoundly change the understanding of a crucial stage in the development of human society. Ian Hodder of Stanford University said, "Göbekli Tepe changes everything".[3][40] If indeed the site was built by hunter-gatherers as some researchers believe then it would mean that the ability to erect monumental complexes was within the capacities of these sorts of groups which would overturn previous assumptions. Some researchers believe that the construction of Göbekli Tepe may have contributed to the later development of urban civilization, as excavator Klaus Schmidt put it, "First came the temple, then the city. https://en.wikipedia.org/wiki/Göbekli_Tepe Turkey: Archeological Dig Reshaping Human History Göbekli Tepe—the name in Turkish for "potbelly hill"—lays art and religion squarely at the start of that journey. After a dozen years of patient work, Schmidt has uncovered what he thinks is definitive proof that a huge ceremonial site flourished here, a "Rome of the Ice Age," as he puts it, where hunter-gatherers met to build a complex religious community. Across the hill, he has found carved and polished circles of stone, with terrazzo flooring and double benches. All the circles feature massive T-shaped pillars that evoke the monoliths of Easter Island. Though not as large as Stonehenge—the biggest circle is 30 yards across, the tallest pillars 17 feet high—the ruins are astonishing in number. Last year Schmidt found his third and fourth examples of the temples. Ground-penetrating radar indicates that another 15 to 20 such monumental ruins lie under the surface. Schmidt's German-Turkish team has also uncovered some 50 of the huge pillars, including two found in his most recent dig season that are not just the biggest yet, but, according to carbon dating, are the oldest monumental artworks in the world. http://www.newsweek.com/turkey-archeological-dig-reshaping-human-history-75101 Edited April 20, 2017 by phart Quote Link to comment Share on other sites More sharing options...
phart Posted April 20, 2017 Share Posted April 20, 2017 There's a lot of stuff buried, the surface of the earth is huge, it'spot luck where you dig and how deep. Quote Link to comment Share on other sites More sharing options...
Ally Bongo Posted April 20, 2017 Share Posted April 20, 2017 4 minutes ago, phart said: You could read a bit before making a judgement lol, not sure how you could possibly make a reasoned decision 15 minutes after hearing about it. Quote Link to comment Share on other sites More sharing options...
Ally Bongo Posted April 20, 2017 Share Posted April 20, 2017 There are some qualified nerds here https://www.quora.com/Could-a-civilization-more-advanced-than-ours-have-existed-on-this-planet-millions-of-years-ago-What-evidence-could-we-use-to-rule-out-the-possibility Quote Link to comment Share on other sites More sharing options...
Grim Jim Posted April 20, 2017 Share Posted April 20, 2017 As a kid, my dad would always reassure me that asking questions was good. Quote Link to comment Share on other sites More sharing options...
phart Posted April 21, 2017 Share Posted April 21, 2017 7 hours ago, Ally Bongo said: There are some qualified nerds here https://www.quora.com/Could-a-civilization-more-advanced-than-ours-have-existed-on-this-planet-millions-of-years-ago-What-evidence-could-we-use-to-rule-out-the-possibility No one said more advanced though. Just a civilisation advanced enough to build these 14000 year old complexes which was wiped out during the extreme flooding that happened at the end of the last ice age. Also old enough to have knowledge of things like the procession of the equinox, elliptical orbits etc. Look at this for example. really interesting http://www.antikythera-mechanism.com/ Quote Link to comment Share on other sites More sharing options...
thplinth Posted April 21, 2017 Share Posted April 21, 2017 9 hours ago, phart said: There's a lot of stuff buried, the surface of the earth is huge, it'spot luck where you dig and how deep. Göbekli Tepe is fascinating and one small sidebar of fascination about it is they reckon it was deliberately buried. WTF was going on back then... Hancock has identified sites that he reckons could be antediluvian (and yes I have been waiting to use that word ). Problem is most human settlements are around the sea and rivers and sea levels are far higher now than then meaning most of the sites are now underwater. Not all but many. He did a whole book on it where he dives them. Quote Link to comment Share on other sites More sharing options...
Grim Jim Posted April 21, 2017 Share Posted April 21, 2017 3 hours ago, phart said: Look at this for example. really interesting http://www.antikythera-mechanism.com/ Amazing machine, but was it not just the equivalent of today's Live Football On TV web page? Quote Link to comment Share on other sites More sharing options...
phart Posted April 21, 2017 Share Posted April 21, 2017 51 minutes ago, Grim Jim said: Amazing machine, but was it not just the equivalent of today's Live Football On TV web page? Made 2000 years ago when common history states that they didn't have the astronomical knowledge to construct it. Might even be an argument that the average Athenian is much more intelligent than the average Llondoner/Glaswegian/New Yorker. also tiny gears made by hand over 30 of them. Quote Link to comment Share on other sites More sharing options...
thplinth Posted April 21, 2017 Share Posted April 21, 2017 That is a great bit of TV where they figure it all out. The guy who built the replica in a box was a delight. I love these uber nerd genius types in action. Some smart feckers out there. Amazing that thing was recovered and figured out never mind what it tells us about antiquity. Quote Link to comment Share on other sites More sharing options...
Toepoke Posted April 22, 2017 Author Share Posted April 22, 2017 I'd never heard about the Younger Dryas impact theory. Fascinating stuff... https://en.m.wikipedia.org/wiki/Younger_Dryas_impact_hypothesis Quote Link to comment Share on other sites More sharing options...
phart Posted April 23, 2017 Share Posted April 23, 2017 19 hours ago, Toepoke said: I'd never heard about the Younger Dryas impact theory. Fascinating stuff... https://en.m.wikipedia.org/wiki/Younger_Dryas_impact_hypothesis https://www.newscientist.com/article/2128512-ancient-carvings-show-comet-hit-earth-and-triggered-mini-ice-age/#.WPq46eTOT20.twitter Quote Link to comment Share on other sites More sharing options...
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