younger dryas impact 2019

[46] They suggested that the hypothesis would probably need to be revised. [7] The proposed markers for the impact event are claimed to have contributed to the transition from Clovis culture to subsequent patterns. In this paper we review the evidence for the Younger Dryas impact hypothesis (YDIH), which proposes that at ∼12.9k cal a BP North America, South America, Europe and the Middle East were subjected to some sort of extraterrestrial event. Lonsdaleite occurs naturally in asteroids and cosmic dust and as a result of extraterrestrial impacts on Earth. In late 2018, a massive impact crater was found partially hidden under Greenland’s Hiawatha Glacier that may have been made at the same time as the proposed Younger Dryas impact. About 12,800 years ago, much of the Earth was plunged into a mini ice age, leading to the extinction of many megafauna species. [a][24], In 2012, scientists reported evidence supporting a modified version of the Younger Dryas impact hypothesis—involving a much smaller, non-cometary impactor—was found in lake bed cores dating to 12,900 YBP from Lake Cuitzeo in Guanajuato, Mexico. "[10], In 2006, this hypothesis was revived in The Cycle of Cosmic Catastrophes: How a Stone-Age Comet Changed the Course of World Culture, a trade book by Richard Firestone, Allen West and Simon Warwick-Smith published by Inner Traditions – Bear & Company and marketed in the category of Earth Changes, a phrase coined by psychic Edgar Cayce. [39] Two papers were published dealing with an "extraordinary biomass-burning episode" associated with the Younger Dryas Impact. [9], This hypothesis was subsequently popularized by Minnesota congressman and pseudoarchaeology writer Ignatius L. Donnelly in his book Ragnarok: The Age of Fire and Gravel (1883), which followed his better-known book Atlantis: The Antediluvian World (1882). The original hypotheses about a comet impact that had a widespread effect on human populations can be attributed to Edmond Halley, who in 1694 suggested that a worldwide flood had been the result of a near-miss by a comet. "The closest encounter will take place precisely on Friday April 13, 2029," says Thackeray. Whiston also attributed the origins of the at… [53], There is evidence that the megafaunal extinctions that occurred across northern Eurasia, North America, and South America at the end of the Pleistocene were not synchronous. [54] A greater disparity in extinction timings is apparent in island megafaunal extinctions that lagged nearby continental extinctions by thousands of years; examples include the survival of woolly mammoths on Wrangel Island, Russia, until 3700 BP,[54][55][57] and the survival of ground sloths in the Antilles,[58] the Caribbean, until 4700 cal BP. Radio and visual data have identified a zodiacal cloud of largely cometary material including the remnants of Comet Encke. "African evidence support Younger Dryas Impact Hypothesis." Shortly after the publication of Ragnarok, one commenter noted, "Whiston ascertained that the deluge of Noah came from a comet's tail; but Donnelly has outdone Whiston, for he has shown that our planet has suffered not only from a cometary flood, but from cometary fire, and a cometary rain of stones. [19][20][21] The article claimed that no nanodiamonds were found[22] and that the supposed carbon spherules could be fungus or insect feces and included modern contaminants. The Younger Dryas is often linked to the Neolithic Revolution, the adoption of agriculture in the Levant. In North America there is a dramatic termination of the stone tool technology of Clovis people. A large crater 31 kilometres in diameter has been discovered in northern Greenland beneath the Hiawatha Glacier. Human populations may also have been indirectly affected at the time in question. www.sciencedaily.com/releases/2019/10/191002110329.htm (accessed April 4, 2021). I do an in-depth review of a new Younger Dryas Cosmic Impact paper that investigates the effects of the Younger Dryas in the Southern Hemisphere. The Younger Dryas impact hypothesis suggests that multiple extraterrestrial airbursts or impacts resulted in the Younger Dryas cooling, extensive wildfires, megafaunal extinctions and changes in human population. podcast MP3 available here. The discovery in South Africa is expected to be integrated with those made in other parts of the world, recognising that the source of the platinum at Wonderkrater could hypothetically be cosmic dust that was dispersed in the atmosphere after a meteorite impact in Greenland. [37], In 2017, scientists reported a Pt anomaly dating at eleven continental sites dated to the Younger Dryas. [3] These animals included camels, mammoths, the giant short-faced bear, and numerous other species that the proponents suggest died out at this time. Science News was founded in 1921 as an independent, nonprofit source of accurate information on the latest news of science, medicine and technology. Jun 3, 2019 - Explore Debbie McClelland's board "Younger Dryas Comet Impact" on Pinterest. [72][74][75][76][77][78][excessive citations]:Details should be specified and individually cited Critics of the hypothesis have repeatedly addressed the responses, and have published counterarguments. [12], In 2008, C. Vance Haynes Jr. published data to support the synchronous nature of the black mats, emphasizing that independent analysis of other Clovis sites was required to support the hypothesis. [47][48] A critique of the Buchanan paper[47] concluded that these results were an insensitive, low-fidelity population proxy incapable of detecting demographic change. Wonderkrater is the 30th site in the world for such evidence. Lake, Marine, and Terrestrial Sediments", "New evidence that an extraterrestrial collision 12,800 years ago triggered an abrupt climate change for Earth", "Did an extraterrestrial impact trigger the extinction of ice-age animals? [64] Researchers have also found no extraterrestrial platinum group metals in the boundary layer, which is inconsistent with the hypothesized impact event. [43] The spike in platinum was documented in a sample dated at 12,744 years BP (calibrated) preceding a decline in a paleo-temperature index based on multivariate analysis of pollen spectra. "We cannot be certain, but a cosmic impact could have affected humans as a result of local changes in environment and the availability of food resources, associated with sudden climate change.". In 2019, a South African team consisting of Francis Thackeray, Louis Scott and Philip Pieterse announced the discovery of a platinum (Pt) spike in peat deposits at Wonderkrater, an artesian spring site in South Africa in the Limpopo Province, near the town of Mookgophong (formerly Naboomspruit) situated between Pretoria and Polokwane. The crater itself is named the Hiawatha Impact … In 2019 research at White Pond near Elgin, South Carolina, conducted by Christopher Moore and 16 colleagues from the University of South Carolina, used a core to extract sediment samples from underneath the pond. Prehistory Decoded . [90] Moreover, this has not yet been accepted as a confirmed impact crater. By Paul Voosen Nov. 14, 2018 , 2:00 PM. "[52] Iridium, magnetic minerals, microspherules, carbon, and nanodiamonds are all subject to differing interpretations as to their nature and origin, and may be explained in many cases by purely terrestrial or non-catastrophic factors. Noting that meteorites are rich in platinum, Thackeray said "Our finding at least partially supports the highly controversial Younger Dryas Impact Hypothesis (YDIH). But working with two colleagues, Professor Louis Scott (University of the Free State) and P… "[29] But they write that the large Pt anomaly "hints for an extraterrestrial source of Pt". ", "Evidence from central Mexico supporting the Younger Dryas extraterrestrial impact hypothesis", "Polycrystalline aggregates of diamond with lonsdaleite from Yakutian [Sakhan] placers", "MAGICIANS OF THE GODS by Graham Hancock", "A Blind Test of the Younger Dryas Impact Hypothesis", "Comprehensive analysis of nanodiamond evidence relating to the Younger Dryas Impact Hypothesis", "Interpreting palaeofire evidence from fluvial sediments: a case study from Santa Rosa Island, California, with implications for the Younger Dryas Impact Hypothesis", "Comprehensive analysis of nanodiamond evidence reported to support the Younger Dryas impact hypothesis", "Widespread platinum anomaly documented at the Younger Dryas onset in North American sedimentary sequences", "Impact crater found under Hiawatha glacier, Greenland ice", "Extraordinary biomass-burning episode and impact winter triggered by the Younger Dryas cosmic impact ∼12,800 years ago. 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Lonsdaleite occurs naturally in asteroids and cosmic dust and as a confirmed impact crater evidence Africa!
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