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Keyword: glaciation

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  • Glacial Archaeologists Have Recovered a 4,000-Year-Old Arrow From Melted Ice

    09/20/2023 9:31:47 AM PDT · by SunkenCiv · 17 replies
    Discover Magazine ^ | September 18, 2023 | Matt Hrodey
    Archaeologists working with Norway’s Secrets of the Ice program recently got a shock when a arrow shaft they had previously dated to the Iron Age turned out to be some 4,000 years old....after the researchers cleaned the glacial silt off one end, they found a notch befitting a stone arrowhead and not an iron one. The team co-directed by Lars Holger Pilø – an archaeologist with the local Department of Cultural Heritage – concluded that the arrow dated to the Stone Age, pending radiocarbon dating.Whatever the results, the arrow joins a wealth recovered by Secrets of the Ice, which has...
  • Rare Stone Age discovery in mid-Norway

    08/25/2023 9:26:24 AM PDT · by SunkenCiv · 14 replies
    Phys dot org ^ | August 22, 2023 | Frid Kvalpskarmo Hansen, Norwegian University of Science and Technology
    ...at Vinjeøra in southern Trøndelag County... The first discoveries to make it to the surface... large pieces of flint that were highly reminiscent of early, pioneer settlements...When the excavations in Vinjeøra got under way properly... the researchers found evidence from people who came to Finnmark from the east around 9000 BC.The ice remained the longest in Scandinavia compared to the rest of Europe during the last Ice Age. The Norwegian coast only became free of ice around 12,500 years ago. The first people arrived in what we now know as Norway and Sweden about 1,000 years later.Skeletal analyses have previously...
  • Aarhus University [Denmark] Researchers Find Arctic Warmer, Ice-Free in Summertime 10,000 Years Ago!

    05/30/2023 10:48:42 AM PDT · by zeestephen · 21 replies
    Watts Up With That ^ | 27 May 2023 | Aarhus University
    Researchers from Aarhus University, in collaboration with Stockholm University and the United States Geological Survey, analyzed samples from the previously inaccessible region north of Greenland...They showed that the sea ice in this region melted away during summer months around 10,000 years ago...During this time period, summer temperatures in the Arctic were higher than today...This was caused by natural climate variability [not] human-induced warming...
  • Study: 'Warm ice age' changed climate cycles

    05/16/2023 11:26:50 AM PDT · by rdl6989 · 34 replies
    Phys.org ^ | May 16 | Heidelberg university
    Long-term expansion of Mediterranean forests and increase in precipitation as well as an enhanced East Asian summer monsoon associated with the increase and northward migration of the Atlantic moisture source. Paradoxically, the glacial was warmer and wetter than the preceding interglacial. Credit: André Bahr Approximately 700,000 years ago, a "warm ice age" permanently changed the climate cycles on Earth. Contemporaneous with this exceptionally warm and moist period, the polar glaciers greatly expanded. A European research team including Earth scientists from Heidelberg University used recently acquired geological data in combination with computer simulations to identify this seemingly paradoxical connection.
  • Cosmic Clockwork: The Outer Space Origin of Ice Age Cycles

    05/16/2023 1:03:28 PM PDT · by Red Badger · 31 replies
    Scitech Daily ^ | MAY 16, 2023 | By NATIONAL INSTITUTES OF NATURAL SCIENCES TOKYO, JAPAN
    Artist’s impression of how astronomical forces affect the Earth’s motion, climate, and ice sheets. Credit: NAOJ A team of researchers, including climatologists and an astronomer, has utilized an enhanced computer model to recreate the ice age cycles that occurred between 1.6 and 1.2 million years ago. The findings indicate that the glacial periods were primarily influenced by astronomical forces in quite a different way than it works in the present day. This information will contribute to a more comprehensive understanding of ice sheets and the Earth’s climate throughout the past, present, and future. The slow, gradual changes in the Earth’s...
  • Some of the first humans in the Americas came from China, study finds

    05/14/2023 7:41:03 AM PDT · by SunkenCiv · 54 replies
    Guardian (UK) ^ | May 9, 2023 | Agence France-Presse
    ...Known as D4h, this lineage is found in mitochondrial DNA, which is inherited only from mothers and is used to trace maternal ancestry.The team from the Kunming Institute of Zoology embarked on a 10-year hunt for D4h, combing through 100,000 modern and 15,000 ancient DNA samples across Eurasia, eventually landing on 216 contemporary and 39 ancient individuals [iow, cherry picking] who came from the ancient lineage.By analyzing the mutations that had accrued over time, looking at the samples’ geographic locations and using carbon dating, they were able to reconstruct the D4h’s origins and expansion history.The results revealed two migration events....
  • Digesta: An overlooked source of Ice Age carbs

    05/02/2023 2:28:45 PM PDT · by SunkenCiv · 17 replies
    University of Michigan ^ | April 24, 2023 | Tevah Platt (U-M Institute for Social Research)
    Early human foragers may have relied on eating the partially digested vegetable matter, called digesta, found in the stomachs and digestive tracts of bison and other large game herbivores...Folding digesta into these models will allow researchers to better address major questions in evolutionary anthropology. It even calls into question the idea that “hunting and gathering,” which all prehistoric people relied on until about 10,000 years ago, was divided by sex, according to author Raven Garvey, associate professor of anthropology and affiliate of the Research Center for Group Dynamics at the U-M Institute for Social Research.Early foragers may, in some contexts,...
  • 'Brown blob' found in Yukon is a well-preserved Ice Age squirrel

    04/07/2023 8:39:41 AM PDT · by BenLurkin · 26 replies
    Yukon paleontologists have this week unveiled another unusual find from the goldfields near Dawson City: a mummified Arctic ground squirrel from the Ice Age, curled up in a ball as though it died while hibernating. It was found a few years ago, but it's being shown off now because the government is preparing the dead rodent for display at the Yukon Beringia Interpretive Centre in Whitehorse, expected to reopen later this spring after a redesign. The animal was actually found in 2018, by a placer miner working at Hester Creek near Dawson City, Yukon. Miners are routinely finding Ice Age...
  • Clues to the Lives of North America’s First Inhabitants Are Hidden Underwater

    04/01/2023 10:10:46 AM PDT · by SunkenCiv · 34 replies
    Smithsonian Magazine ^ | March 29, 2023 | Sean Kingsley
    Below the surfaces of freshwater springs, lakes and rivers, sunken landscapes hold clues about the daily lives, beliefs and diets of the first humans to settle in what is now the United States. But submerged prehistory, as the study of these millennia-old sites is widely known, is often overlooked in favor of more traditional underwater archaeology centered on shipwrecks...From Miami to Lake Huron to Warm Mineral Springs, these are three sites driving the conversation about the nascent discipline.The hunt for sunken evidence of early humans in North America began some 60 years ago with a swirl of controversy in southwestern...
  • Eight New Types Of Ancient Human Discovered, Researchers Claim

    03/06/2023 7:07:32 AM PST · by Red Badger · 25 replies
    Daily Caller ^ | March 06, 2023 8:58 AM ET | KAY SMYTHE
    A study published in early March identified at least eight new groups of ancient humans that lived through earth’s most recent Ice Age. Researchers used the genomes of 357 ancient European humans who existed between 5,000 and 35,000 years ago to assess which ancestry profiles survived through the Last Glacial Maximum (25,000 t0 19,000 years ago), according to the study published March 1 in Nature. The analysis revealed eight distinct tribal groups who are believed to have existed in Europe and were developed enough to survive through the Ice Age. Each of the groups were given a unique name, such...
  • Catastrophe and Cartography - Ice Age Floods Visualized

    02/08/2023 10:49:33 AM PST · by SunkenCiv · 10 replies
    YouTube ^ | February 3, 2022 | Peter Zelinka
    Catastrophe and Cartography - Ice Age Floods VisualizedPeter Zelinka | 74.7K subscribers | 1,368,124 views | February 3, 2022(author note:) Since we are covering numerous controversial topics in this video, I wanted to be sure and include lots of links for you to do your own research on. One of the most important points to keep in mind though, is that water and erosion are scale-invariant. In other words we can see the same shapes and patterns, but on radically different scales. The small current ripples that you see along the creek can be found at West Bar Ripples in...
  • New last ice age findings in Palawan cave

    09/27/2022 8:56:44 AM PDT · by SunkenCiv · 22 replies
    University of the Philippines Diliman ^ | September 12, 2022 | Mariamme D. Jadloc
    Archaeologists from UP Diliman (UPD) and the National Museum, and leaders and members of the indigenous Pala’wan community unearthed new discoveries dating back to the last glacial maximum (LGM) or at the height of the last ice age at Pilanduk Cave in Palawan.The research Tropical island adaptations in Southeast Asia during the Last Glacial Maximum: evidence from Palawan presented new data from the re-excavation of Pilanduk Cave such as “evidence for specialized deer hunting and freshwater mollusc foraging, LGM fossils for the tiger and remains of other native mammal and reptile fauna of Palawan,” UPD archaeologist Janine Ochoa, PhD, said...
  • Ice-age remains near Sea of Galilee show ancient residents thrived as ice melted

    02/14/2022 10:40:55 PM PST · by SunkenCiv · 6 replies
    Phys dot org ^ | January 26, 2022 | Hebrew University of Jerusalem
    The Israeli site, known as Ohalo II, was occupied at the end of the last Ice Age ("Last Glacial Maximum"), between 23,500 and 22,500 years ago. Ohalo II is known for the excellent preservation of its brush huts and botanical remains. The study, led by HU doctoral student Tikvah Steiner, under the supervision of HU Professor Rivka Rabinovich and University of Haifa archaeologist Prof. Dani Nadel who excavated the site, examined the diet and extensive use of animal parts to determine the welfare and lifestyle of these ancient inhabitants.During the Last Glacial Maximum, ice sheets covered much of North America,...
  • The World's Largest Organism Is Slowly Being Eaten, Scientist Says

    11/24/2021 12:42:33 PM PST · by Red Badger · 53 replies
    https://www.sciencealert.com ^ | 24 NOVEMBER 2021 | RICHARD ELTON WALTON
    Aerial outline of Pando. (Lance Oditt/Friends of Pando) RICHARD ELTON WALTON, THE CONVERSATION24 NOVEMBER 2021 In the Wasatch Mountains of the western US on the slopes above a spring-fed lake, there dwells a single giant organism that provides an entire ecosystem on which plants and animals have relied for thousands of years. Found in my home state of Utah, "Pando" is a 106-acre stand of quaking aspen clones. Although it looks like a woodland of individual trees with striking white bark and small leaves that flutter in the slightest breeze, Pando (Latin for "I spread") is actually 47,000 genetically identical...
  • Something Big Happened to the Planet a Million Years Ago

    11/09/2021 12:13:25 PM PST · by Red Badger · 42 replies
    https://scitechdaily.com ^ | NOVEMBER 9, 2021 | By EARTH INSTITUTE AT COLUMBIA UNIVERSITY
    A new study suggests that a million years ago, glaciers began sticking more persistently to their beds, triggering cycles of longer ice ages. Here, ice discharged from Iceland’s Breiðamerkurjökull glacier on its way to the Atlantic ocean. Credit: Kevin Krajick/Earth Institute Why did glacial cycles intensify a million years ago? Researchers find clues on the bed of the Atlantic Ocean. Something big happened to the planet about a million years ago. There was a major shift in the response of Earth’s climate system to variations in our orbit around the Sun. The shift is called the Mid-Pleistocene Transition. Before the...
  • Etched in sands of time: ‘We knew they were old’ (Human footprints - oldest known humans in America 23,000 years ago)

    09/24/2021 11:13:26 AM PDT · by CedarDave · 15 replies
    The Albuquerque Journal ^ | September 23, 2021 | Ryan Boetel
    About 23,000 years ago, a group of children and teenagers left footprints along Lake Otero in what is now southern New Mexico – perhaps they were fetching water for adults hunting a mammoth or the massive ground sloth that roamed the area in those days. This week, a team of researchers from White Sands National Park, the National Parks Service and others published an article in the journal Science, which concludes that those children’s footprints were the oldest known human tracks ever found in North America. Imprints of the tiny toes were found along outcrops of the since-dried-up lake, which...
  • Fossil footprints show humans in North America more than 21,000 years ago

    09/24/2021 4:27:02 AM PDT · by BenLurkin · 25 replies
    nbc ^ | Sept. 23, 2021, 11:00 AM PDT
    The footprints at White Sands were dated by examining the seeds of an aquatic plant that once thrived along the shores of the dried-up lake, Ruppia cirrhosa, commonly known as ditchgrass. According to research published Thursday in the journal Science and co-authored by Bustos, the ancient ditchgrass seeds were found in layers of hard earth both above and below the many human footprints at the site, and they were radiocarbon-dated to determine their age. The tracks at one location have been revealed as both the earliest known footprints and the oldest firm evidence of humans anywhere in the Americas, showing...
  • Ancient Footprints Push Back Date of Human Arrival in the Americas

    09/23/2021 1:24:31 PM PDT · by Theoria · 102 replies
    The New York Times ^ | 23 Sept 2021 | Carl Zimmer
    Human footprints found in New Mexico are about 23,000 years old, a study reported, suggesting that people may have arrived long before the Ice Age’s glaciers melted. Ancient human footprints preserved in the ground across the White Sands National Park in New Mexico are astonishingly old, scientists reported on Thursday, dating back about 23,000 years to the Ice Age.The results, if they hold up to scrutiny, would rejuvenate the scientific debate about how humans first spread across the Americas, implying that they did so at a time when massive glaciers covered much of their path.Researchers who have argued for such...
  • Experts find evidence of 12,000-year-old flood of epic proportions that drained an ancient lake at a rate of more than 800 Olympic swimming pools per second

    08/07/2021 5:31:47 PM PDT · by BenLurkin · 26 replies
    DAILYMAIL.COM ^ | 6 August 2021 | CHRIS CIACCIA
    The ancient lake, which no longer exists, covered an area of 580,000 square miles in modern-day southern Manitoba, central Saskatchewan all the way up to the Alberta border. It's likely that the 'catastrophic meltwater to drain to the Arctic Ocean' occurred over a 6–9 month period during the Younger Dryas, but they are not yet clear if this happened during the beginning of the event. Using sedimentary evidence, more than 100 valley cross sections, and a model comprised of gradual dam failure with the bedrock's erodibility and the size of the lake, the researchers estimated that 2 million cubic meters...
  • Recolonisation of Europe after the last ice age started earlier than previously thought

    05/03/2021 2:23:44 PM PDT · by SunkenCiv · 12 replies
    HeritageDaily ^ | April 22, 2021 | Estonian Research Council
    A study that appeared today on Current Biology sheds new light on the continental migrations which shaped the genetic background of all present Europeans.The research generates new ancient DNA evidence and direct dating from a fragmentary fossil mandible belonging to an individual who lived ~17,000 years ago in northeastern Italy (Riparo Tagliente, Verona). The results backdate by about 3,000 years the diffusion in Southern Europe of a genetic component linked to Eastern Europe/Western Asia previously believed to have spread westwards during later major warming shifts...This individual, whose half-mandible had been found at Riparo Tagliente in 1963, shares genetic affinities with...