The Egyptian accounting which Plato recorded in “Timaeus” used units which interchanged by 10.It’s rather funny the way everybody assumes that Plato meant this when he said that, and all on different aspects of his tale. Great to know that with this info we really could be on the cusp of a new ice age.The pattern of the past interglacial-glacial cycles is that the descent into a colder climate from the previous interglacial is, overall, a relatively gradual process, with the coldest temperatures occurring just before the next interglacial starts with a bang (that is, a rapid climb into a warmer climate). Sorry, your blog cannot share posts by email. You aren’t reading me clearly. Get in touch with feedback or guest suggestions by emailing Get twice-monthly updates featuring our latest research, events near you and high-impact career opportunities.We're affiliated with the University of Oxford's Future of Humanity Institute and the Oxford Uehiro Centre for Practical Ethics.We're affiliated with the University of Oxford's Future of Humanity Institute and the Oxford Uehiro Centre for Practical Ethics.We're part of the Centre for Effective Altruism, and work closely with Giving What We Can.80,000 Hours is part of the Centre for Effective Altruism, a registered charity in England and Wales (Charity Number 1149828) and a registered 501(c)(3) Exempt Organization in the USA (EIN 47-1988398).We do our best to provide useful information, but how you use the information is up to you. Longer, if you think about the homo genus. In North America and the Middle East, Bunch et al. 1/3. An international panel of experts has ruled in favor of the theory proposed in 1980 by the late Berkeley Lab physicist Luis Alvarez and his son Walter, a UC Berkeley geologist, that a large asteroid struck the earth 65 million years ago, triggering the extinction of the dinosaurs. Remembering that 900 years before Plato, the “Pillars of Hercules” referred to the Sicilian pass (later called “Scylla and Charbides”). Keep up the good work.Ahhh!
An impact event (or volcanism) could definitely be a part of this picture. Boy are these guys afraid.You & Steve are clearly projecting. As has been said many many times, no actual impact is required, just an air burst.I’m concerned that yet more pseudoscience is being perpetrated.Your heroes’ press release calls it an impact. In any case, different species & populations went extinct at different times, as nearly as evidence can be resolved.Actually, at Blackwater Draw there were mammoth bones immediately under the black layer – which has been dated to 12.8 ya on many occasions. Four of these have appeared on WUWT (some with comments from me) at the dates listed below: You can read the articles in the WUWT archives by searching for ‘cosmic Younger Dryas.’Exactly. But, basically speaking, with 2000 centuries of track record, the chance ends up being something less than one in 2000 is what we can kind of learn from that. (2012) found large, well-defined YDB spherule peaks at sites common to the study by Surovell et al. Another reason is that some specialists in human prehistory say that the rapidly deteriorating climate in areas which had enjoyed substantial population growth during the immediately preceding warm period may have led to the invention of agriculture to create a more reliable source of food.There could have been an impact at the older YDB but we don’t need it to cause whatever the Younger Dryas was. If indeed you & Steve are two separate individuals.There is no “pack attack” There is just the recognition by scientifically literate commenters that this “hypothesis” is yet another crock masquerading as science.The bottom line remains that you cannot explain the multiple, intense temp fluctuations of the late Pleistocene (YD and older) by cosmic impact.USGS on the 2012 black mat study finds YGIH myth busted:It’s all about the funding. So you might think that the case for existential risk is still really strong and important, but there’s only 1% risk. If previous glacials ended with the same YD pattern as the most recent one, that kills your impact theory stone-cold dead, end of story dead, terminated.You guys are the ones who brought up deus ex machina.Even more problematic are apparently anomalous dates that lie far outside the range of previously accepted LADs. After rejecting the supernova hypothesis, what became the new hypothesis for the Alvarez team? So, he sees this as this problem, and I kind of agree. These objects didn’t just appear in the sky one day – they were seen on their way here, as what we call comets, and the archaeologists have normally transliterated as “gods”.Something about that dispersal pattern that bothers me. Your answer would be 1/6. The word for this behavior is “whistleblowers”.”WUWT is a science site.
I think that you can divide it into these two parts. Crucially, the cores also showed a near complete absence of In 1980, a team of researchers led by Nobel prize-winning physicist The evidence for the Alvarez impact hypothesis is supported by Using estimates of the total amount of iridium in the K–Pg layer, and assuming that the asteroid contained the normal percentage of iridium found in The most easily observable consequence of such an impact would be a vast dust cloud which would block sunlight and prevent photosynthesis for a few years, an event called an Global firestorms may have resulted as incendiary fragments from the blast fell back to Earth.
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