Articles tagged with Radiocarbon
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A recent study by the University of Adelaide found that K'gari's largest lakes dried out around 7,500 years ago due to a strong drying event. The researchers also discovered that wind patterns may have influenced rainfall on the island, putting its lakes at risk of drying again in the future.
Researchers estimate a medieval tsunami struck Anegada between 1381 and 1391, based on analysis of coral skeletons. The finding supports efforts to prepare for future tsunamis in the Caribbean region.
A recent study in Nature Geoscience offers important new insights into the hidden role of ancient groundwater beneath the ocean floor. Researchers found that fossil groundwater changed its composition after the retreat of the Fennoscandian ice sheet, becoming vulnerable to mixing with seawater.
A large-scale pre-Columbian fish-trapping facility was discovered in the Crooked Tree Wildlife Sanctuary in Belize, dating back to the Late Archaic period around 2000-1900 BCE. The facility, which included a network of linear channels and ponds, would have yielded enough fish to feed up to 15,000 people year-round.
A WVU researcher says ancient tree rings can record rare and extreme space weather events, including geomagnetic storms. The study aims to better understand how to prepare for such events and mitigate their impact on communication satellites and astronauts.
Researchers challenge traditional theory that warrior groups with Steppe genetic component violently replaced local population. They propose alternative scenario where groups with Steppe ancestry mixed with demographically weakened locals.
A revised radiocarbon calibration curve for the period between 433-250 BCE has been established, allowing for improved date estimates on Greek shipwrecks. The study confirms the Kyrenia Ship's final voyage around 280 BCE, slightly later than previous estimates.
Researchers at Cornell University have used a combination of almond analysis, pottery dating, and radiocarbon dating to determine the Kyrenia shipwreck's age. The team estimated that the ship sank between 296-271 BCE, with a strong probability it occurred between 286-272 BCE.
A new study reveals that climate models overestimate the storage time of carbon in plants, meaning it is released back into the atmosphere sooner than predicted. This has implications for nature-based carbon removal projects and our understanding of the role of nature in mitigating climate change.
Researchers from the University of Helsinki used tree ring analysis to measure radiocarbon concentration after a massive solar storm, revealing new insights into atmospheric dynamics. The study provides valuable information on how to prepare for future threats from solar storms, which could disrupt electrical and mobile networks.
A new study published in PLOS ONE provides detailed insights into the timing of events in ancient Gezer, a city known from Egyptian, Assyrian, and Biblical texts. The radiocarbon dates suggest that some proposed correlations between the archaeological record and ancient texts are plausible.
A study published in PLOS ONE found correlations between climate change and human population trends in Central European regions. During warm periods, populations increased due to improved crops and economies, while during cold periods, populations decreased, leading to cultural shifts and potential social inequality.
Researchers have identified a massive solar storm 14,300 years ago in ancient tree rings, which could be catastrophic for modern technological society. The study warns of the importance of understanding such storms to protect global communications and energy infrastructure.
Researchers have identified that ancient quakes occurred in shallow faults on the Puget Lowlands in western Washington, which could lead to another devastating event. The study used tree rings to pinpoint the dates of these quakes and found a link between them, suggesting regional hazard models may need to be updated.
Researchers uncover charcoal drawings at Gua Sireh Cave, dating back to the 1600s and 1800s AD, depicting Indigenous resistance to frontier violence. The site's unique artwork sheds light on the region's complex history of colonization and territorial violence.
A new study enhances radiocarbon dating by creating a precise record of atmospheric shifts over 14,000 calendar years BP. This improvement allows for more accurate dating of sub-fossil samples, enabling researchers to reconstruct past environmental and climate changes during glacial times.
Researchers develop innovative method to analyze ancient bones, making collagen quantifiable and mapping possible. This technique supports the selection of samples for radiocarbon analysis, preserving valuable material and reducing destruction.
The new Radiocarbon 3.0 method provides valuable new insights into the earliest human history, starting with the interaction between Homo Sapiens and Neanderthals in Europe. This is achieved through updated radiocarbon pretreatment, latest AMS instrumental advances, and the application of the Bayesian model coupled with the new IntCal20.
A new study published in AGU Advances found that post-lockdown auto emissions rebounded in some California areas, with affluent neighborhoods experiencing less pollution drop. The researchers used mobile laboratory data and analyzed grass samples to track CO2 levels and found significant differences between regions.
A study published in the Journal of Archaeological Science reveals that a domestic dog lived in the Palaeolithic period 17,000 years ago in the Erralla cave in the Basque Country. The bone remains identified as Canis lupus familiaris, making it one of Europe's most ancient domestic dogs.
Three pre-Columbian South American mummies found evidence of lethal trauma, with two males dying from extreme intentional violence. The study used 3D CT scans to examine the mummies and provide new insights into the rate of trauma and violent deaths in prehistoric human societies.
A study found that a sea level drop 2,000 years ago caused the decline of Sambaqui society, forcing groups to disperse into smaller social units. The remaining populations intensified fishing, exploiting high-trophic level species.
Recent advances in radiocarbon knowledge have improved our understanding of climate processes, solar activity, geophysics, and the carbon cycle. Researchers developed a more detailed record of atmospheric radiocarbon extending back 55,000 years, helping to understand Earth's past and project future changes.
A team of scientists discovered that Europeans were present in the Americas in 1021 AD, marking the earliest known point of Atlantic crossing. This date also signifies humanity's circumnavigation of the planet.
A new study dating the Purākaunui pits to 1430-1460 CE provides evidence for rua kumara storage in southern New Zealand, connecting local Māori traditions with archaeology. The discovery sheds light on how scientific evidence complements mātauranga Maori knowledge around taonga storage.
Researchers have found that 42,000-year-old New Zealand kauri trees can accurately analyze the last complete reversal of the Earth's magnetic field. The study's findings suggest that the weak magnetic field had a significant impact on the atmosphere, leading to increased cosmic radiation and changes in ozone levels.
A new study reveals that a 42,000-year-old magnetic reversal led to significant changes in atmospheric ozone concentration and circulation. The event, known as the Laschamps excursion, caused substantial shifts in climate and environmental patterns worldwide.
Researchers found evidence suggesting that relatively close supernovas could have triggered four disruptions to Earth's climate over the last 40,000 years. The study used tree ring records to search for fingerprints of distant cosmic explosions, with promising candidates including a 13,000-year-old Vela supernova.
Researchers have recalibrated the radiocarbon age curve, revealing a time dilation that shifted the overlap between Neanderthals and Homo sapiens from over 6,000 years to less than 4,000 years. The revision is attributed to a geomagnetic field minimum 41,000 years ago.
Researchers developed new international radiocarbon calibration curves, improving accuracy for dating artefacts and predicting future climate patterns. The updated curves provide previously impossible precision and detail, enabling scientists to study the demise of the Neanderthals and understand historic climate patterns.
A Cornell University study re-dates Native American sites in the Mohawk Valley, revealing a more accurate historical timeline based on maize dating and statistical modeling. The findings challenge previous assumptions about trade practices and European contact.
A new study refines radiocarbon dating to better understand Mediterranean history, including the tomb of Tutankhamen and a volcanic eruption on Santorini. Regional variations in cosmic radiation lead to small but critical periods of variation in radiocarbon levels.
Researchers used radiocarbon analysis to determine the carbon age of non-photosynthetic orchids, revealing they obtain carbon from dead wood via saprotrophic fungi. This finding overturns traditional views and opens a new perspective on how these plants have become ecologically successful.
A new study by the University of Oregon team reevaluated radiocarbon dating results from cultural sites on 55 islands, revealing that seafaring South Americans settled first on large northernmost islands of the Greater Antilles. The findings challenge a long-held stepping-stone model of Caribbean colonization.
Researchers have found stone tools and other artifacts at Cooper's Ferry site in Idaho dating back to 15,000-16,000 years ago, contradicting the 'Clovis First' theory of early human migration. The discovery supports the hypothesis that people entered North America via a Pacific coastal route.
Researchers used radiocarbon dating to identify a 1985 forgery, finding excess 14C in oil from seeds in the 1950s and 1960s. The technique could help detect modern forgeries by analyzing micropaint samples.
Radiocarbon dating reveals ancient plants preserved on Baffin Island have been covered by ice for at least 40,000 years. The findings suggest the region may be experiencing its warmest century in 115,000 years.
Researchers have dated the ancient Minoan eruption of Thera to between 1600 and 1525 BC using tree ring analysis, which overlaps with previously estimated dates from archeological evidence. This discovery resolves long-standing debates about the timing of the eruption.
A study reanalyzes ages of human remains found at the Anzick site in Montana, resolving a previously discovered discrepancy between Clovis artifacts and human remains. The analysis suggests that Anzick may be the only known example of burial in the Clovis culture.
New research from Cornell University challenges widely accepted radiocarbon dating standards, potentially altering historical timelines for the southern Levant region. The study reveals variations in the radiocarbon cycle, causing offsets of up to 20 years in calibration, which could be related to climatic conditions.
Researchers from Bar-Ilan University have uncovered new evidence supporting the existence of Israel's united monarchy. The findings suggest that the Kingdom extended beyond Jerusalem's immediate surroundings, with a large residence discovered at Tel 'Eton in the Shephelah region dating back to the 10th century BCE.
A 3,000-year-old horse burial in Sudan has provided significant insights into the Kushite state formation and the role of horses in ancient Nubian culture. The discovery, dated to around 950 BC, reveals that horses were central to the state's identity and foreshadowed later developments in Nubian kingship.
A mass grave uncovered in Repton, Derbyshire, has been dated to the late 9th century, consistent with the Viking Great Army's presence in England. The graves contain a mix of men and women, including several with signs of violent injury, suggesting a possible ritual burial site.
A bioarchaeological study of cranial modification practices in the Colca Valley found a significant increase in prevalence over time, with oblique modification becoming predominant. This suggests that modification contributed to the creation of a new collective identity and reinforced social inequality.
A new study using precision chronology sheds light on the origins of Mongolia's nomadic horse culture, revealing that domestic horse ritual spread rapidly across the Mongol Steppe at around 1200 BC. This finding challenges previous hypotheses about the development of horsemanship and its relationship to climate change.
Researchers at the University of Oxford propose a new method to detect radiocarbon spikes in tree-rings, which could accurately date historical events from thousands of years ago. This technique has the potential to revolutionize the study of ancient civilizations and anchor chronologies concerning important world civilisations.
Researchers analyzed carbon-dated artifacts at archaeological sites to conclude that a population boom and scarce food led to early farming in eastern North America around 5,000 years ago. This transition enabled large numbers of people to live in one place, ultimately setting the stage for civilization.
Researchers have developed a compact and highly sensitive optical method for detecting radiocarbon dioxide concentration, enabling on-site carbon dating and greenhouse gas measurements. The SCAR instrument can deliver results in just two hours with lower cost and faster delivery time compared to traditional methods.
Researchers used radiocarbon in deep-sea fossil corals to reconstruct CO2 levels and ocean circulation during the last deglaciation. The study found two massive transient events that flushed out respired carbon, causing rapid CO2 rise and abrupt warming in the North Atlantic region.
The increasing levels of fossil fuel emissions could dilute radioactive carbon-14 in the atmosphere, artificially raising its age. This could impact various applications of radiocarbon dating, including archaeology, art authentication, and neurological research, potentially affecting results by the 2020s.
Researchers from the University of Birmingham have re-dated the end of the Greek Bronze Age to 925-1025 BCE, based on radiocarbon analysis of animal bones and plant remains. This new chronology challenges traditional estimates and has implications for our understanding of ancient civilizations in the Mediterranean.
A new study suggests that adult white sharks in the Northwest Atlantic Ocean may live for up to 70 years or longer. Researchers used radiocarbon dating to determine age estimates and found that growth rates slow down as sharks age, leading to underestimated ages.
A CU-Boulder study reveals Arctic temperatures have risen beyond the past 44,000 years, with potential implications for global climate change. The research uses radiocarbon-dated plants to reconstruct past climates and suggests the warming is outside known natural variability.
A new method for dating elephant tusks using radiocarbon levels could help enforce the ivory ban and save African elephants from extinction. The technique, developed by Columbia University researchers, can be applied to other endangered wildlife and is affordable for government agencies.
A team of researchers found that bacteria in Bangladesh's aquifers use surface-derived organic carbon, which is naturally released from sediment into groundwater. This process predates recent human interaction and suggests that intensive pumping has not yet significantly affected arsenic release.
A new study provides a geological timeline for ice loss in West Antarctica, shedding light on the recent rapid melting of glaciers and improving predictions for future sea-level rise. The research reveals that exceptional changes in glacier retreat may occur only rarely over the past 10,000 years.
Researchers extracted cores from Japan's Lake Suigetsu, containing organic material that provides a direct record of atmospheric carbon, extending the radiocarbon dating record by over 40,000 years. This discovery enables scientists to pinpoint more accurately the timing of events such as Neanderthal extinction and modern human migration.
A new series of radiocarbon measurements from Japan's Lake Suigetsu provides a more precise and accurate dating method, especially for older objects. The record stretches back 52,800 years, offering improved resolution and confidence in radiocarbon dating.
A multidisciplinary approach combining radiocarbon analysis, anthropological analysis, and forensic DNA techniques has been used to identify the remains of a missing child 41 years after discovery. The method was successful in pinpointing birth dates and death dates for the child, providing a breakthrough in solving cold cases.
A new study confirms that humans used Oregon's Paisley Caves as early as 12,450 radiocarbon years ago, with projectile points of the Western Stemmed tradition. The findings suggest parallel technological development and potentially pre-date Clovis sites.