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Member Run Boards >> Environment >> Last Days of the Dinosaurs. http://www.ozpolitic.com/forum/YaBB.pl?num=1608341817 Message started by JaSin. on Dec 19th, 2020 at 11:36am |
Title: Last Days of the Dinosaurs. Post by JaSin. on Dec 19th, 2020 at 11:36am
Here's a good little read.
https://www.popularmechanics.com/science/animals/a34968104/mass-extinctions-happen-every-27-million-years/ One of the famous Mass Extinctions was due to a lot of METHANE in the atmosphere that wiped out 95% of all life. Throw in the fact that the 'average' global temperature of 'stability' in Earth's history was much more higher than it is today. Can Humans survive a temperature of 60+C high? Doubt it unless everyone was wearing heat suits and scuba tanks. The most famous Mass Extinction is the Meteor one that wiped out the Saurian phase. The Military like this one, because it justifies putting weapons in space to protect the planet... not that they will be pointing at earth occassionally. ;) This suits the Military more than the 'Polluted' Mass Extinctions of Climate Changes - which are more common. Coincidence that Sapiens entered Australia and 'suddenly' all the Mega Fauna 'dissapeared' from giant fire-farming BBQ's and hunting - although, so as not to be considered 'racist', is now blamed on Climate Change. Only a severe 10,000 year drought which ended recently for the Aboriginal peoples here - really made any 'environmental' impact (it actually scuttled Aboriginal Culture here, 'before' Whiteys came to finish the job. Even the Central American Civilisations were scuttled by Mass Droughts. |
Title: Re: Last Days of the Dinosaurs. Post by lee on Dec 19th, 2020 at 12:40pm Jasin wrote on Dec 19th, 2020 at 11:36am:
Wrong. It is suspected and has nothing to do with the material supplied. Methane is not mentioned. The new study is a computer compiled learning AI. "Non-marine tetrapods (amphibians, reptiles, birds and mammals) have apparently experienced at least 10 distinct episodes of intensified extinctions over the past 300 My. Eight of these ten non-marine extinction events are concurrent with known marine-extinction episodes, which previously yielded evidence for an underlying period of ~26.4 to 27.3 My. We performed circular spectral analysis and Fourier transform analysis of the ages of the ten recognised tetrapod-extinction events, and detected a statistically significant (99% confidence) underlying periodicity of ~27.5 My. We also find that the eight coeval non-marine/marine-extinction pulses all occurred at the times of eruptions of Large Igneous Provinces (LIPs) (continental flood-basalts and oceanic plateaus), with potentially severe environmental effects. Three of these co-extinction episodes are further correlated with the ages of the three largest (≥100-km diameter) impact craters of the last 260 My, which are also apparently capable of causing extinction events. These findings suggest that global cataclysmal events with an underlying periodicity of ~27.5 My were the cause of the coordinated periodic extinction episodes of non-marine tetrapods and marine organisms." https://www.tandfonline.com/doi/full/10.1080/08912963.2020.1849178 |
Title: Re: Last Days of the Dinosaurs. Post by Bobby. on Dec 19th, 2020 at 1:48pm
Posted by Monk at his MRB:
https://www.youtube.com/watch?v=rdgc-xpr6E8 Even without the giant meteorite the day of the dinosaurs was over. They were very specialised and things were changing: 1. Grasslands were appearing, allowing small mammals to thrive. Animals preying on these mammals would also eat dinosaur eggs 2. Conifers were being replaced by flowering, deciduous trees—what did the dinosaurs eat in winter after deciduous trees lost their leaves? Dinosaurs left behind birds, snakes and crocodiles and alligators. |
Title: Re: Last Days of the Dinosaurs. Post by Bobby. on Dec 19th, 2020 at 2:35pm
I just replied to Monk.
He wasn't happy about me copying "his" content. http://www.ozpolitic.com/forum/YaBB.pl?num=1608060045/0#3 Quote:
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Title: Re: Last Days of the Dinosaurs. Post by JaSin. on Dec 20th, 2020 at 2:00pm lee wrote on Dec 19th, 2020 at 12:40pm:
You're right Lee. That link doesn't state 'specifically' that Methane Mass Extinction. That was taken from previous older sources and docos which may be debatable now? But it is apparent that 'Climate' has produced the majority of Mass Extinctions. Few times, the planet has been 'totally' covered in ice/snow for millions of years. We say we live in a habitable zone as a planet. But this zone can produce major inhabitable conditions upon the planet too. Seems the 'habitable zone' on this Planet is also just a 'fine line' around the sun. |
Title: Re: Last Days of the Dinosaurs. Post by JaSin. on Dec 20th, 2020 at 2:02pm Bobby. wrote on Dec 19th, 2020 at 2:35pm:
This is Monk's Forum apparently, not FD's. ::) |
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