Articles tagged with Ice Ages
A new study analyzed 500 spear points to understand how early humans in the Tennessee River Valley region adapted to unfamiliar environments, using resharpening techniques to manage resources. The research found that the Clovis groups were more likely to resharpen spearheads, indicating a concern for resource management, while the Cumb...
Researchers found that fluctuations in seawater chemistry followed the rhythm of ice ages, driven by Icelandic ice sheet dynamics. Volcanic material from Iceland released neodymium with distinct radiogenic signatures, influencing ocean circulation and geochemical cycles.
A 304-million-year-old warming event could inform scientists about rapidly changing Earth conditions. A small temperature spike led to a larger one from melting permafrost, with global sea surface temperatures rising by over 7 degrees Celsius.
A new study reveals that ancient Britons likely transported the Altar Stone of Stonehenge 700km across challenging terrain, requiring careful planning and coordination. The research uses mineral grain dating and ice-sheet modeling to confirm human transport over natural Ice Age processes.
Researchers developed a new method to carry out long-term climate simulations at a fraction of the cost and time needed compared to traditional climate models. The team used a powerful climate model to train a much faster statistical emulator that can reproduce climate changes in just minutes.
A research team found that enhanced silicate weathering contributed to CO2 drawdown and the onset of the Late Paleozoic Ice Age, reducing atmospheric CO2 levels by approximately 800 ppm. This process also boosted marine nutrient supply and productivity, leading to the observed shifts in carbon isotopes.
Scientists have found that African frogs' diversity is linked to historical climate conditions, indicating they adapted to changing environments. The study suggests that even after 12,000 years, tropical frogs still remember the impact of past ice ages on their habitats.
A new international study reveals that the ancestors of modern crop viruses likely emerged before the last Ice Age, affecting both wild and cultivated plants. The viruses, spread by leaf-eating beetles, infect various crops and wild species, posing risks to agriculture and natural ecosystems.
A study of deep-sea cores suggests that rapid climate swings during the Quaternary Period led to variability in glacial periods, which may have influenced early human evolution. The research found that climate conditions switched from stable warmth to cold chaos around 2.7 million years ago.
Scientists have discovered evidence of repeating climate cycles operating every few years to decades during the Cryogenian glaciation, a period known as Snowball Earth. The findings suggest that these cycles were likely exceptions rather than the norm, and were triggered by small patches of open ocean in the tropics.
Researchers found a surprising correlation between West Antarctic Ice Sheet retreat and marine algae growth over the past 500,000 years. The study suggests that global warming may lead to reduced CO2 uptake if the ice sheet continues to shrink.
Researchers analyzed over 500 zircon crystals and found no evidence of glaciers transporting the bluestones to Stonehenge. The study strengthens the case for human transport, leaving the exact method a mystery. Advanced mineral fingerprinting techniques provided key insights into geological history.
Mars plays a measurable role in shaping Earth's long-term climate patterns, including ice ages, through its gravitational influence and orbital cycles. The study suggests that Mars' presence is necessary for the existence of major climate cycles, which have driven evolutionary changes on Earth.
The study reveals that the Patagonian ice sheet underwent periods of expansion and contraction, contrary to earlier assumptions. The driving force for long-term fluctuations was found to be changes in summer seasons and solar radiation, known as integrated summer energy.
Research from Umeå University reveals that natural barriers shape the flow of water and hinder plant dispersal in rivers shaped by the last Ice Age. The study found no clear correlations between drainage area and channel width, or consistent increase in plant species diversity downstream.
Researchers at UC Riverside discovered a carbon burial process in the ocean that can cause Earth's temperature to overshoot and cool down, potentially triggering an ice age. The study suggests that the planet's thermostat is not functioning as expected due to changes in atmospheric oxygen levels.
A global analysis using machine learning predicts glacial erosion rates for 180,000 glaciers worldwide, with most experiencing erosion between 0.02-2.68 millimeters per year. The study identifies complex factors influencing erosion, including temperature, water under the glacier and rock type.
An international team of researchers proposes that a meteorite impact just west of Winslow, Arizona, created Meteor Crater and triggered a massive landslide in the Grand Canyon. The study found evidence of a paleolake forming at the same time, with driftwood dating back to around 55,000 years.
A new study found that chemical reactions in newly uncovered glacial sediments initially suppress greenhouse gas emissions, but as soil matures, it produces more methane, contributing to warming. The research provides insights into the role of soil and water in the climate change cycle.
Researchers found that thick ice cover suppressed volcanic eruptions, but as glacial ice melts, pressure builds and magma is released, leading to more frequent and explosive eruptions. This phenomenon could occur worldwide, including Antarctica, and may have global climate impacts, including long-term warming.
Research team studied sediment cores and found evidence of seasonal sea ice in the Arctic Ocean. The study's findings suggest that warm Atlantic water continued to flow into the Arctic gateway, keeping some parts of the ocean from freezing over completely.
A new study has found that two ancient Ice Age 'puppies' are likely to be wolf cubs, not dogs, based on genetic analysis of their gut contents and other chemical 'fingerprints'. The discovery provides insight into the diet and breeding behaviors of Pleistocene wolves, which lived in a diverse environment with varied ecosystems.
A recent study has discovered that cold-adapted species began evolving 2.6 million years ago, with many modern species emerging around 700,000 years ago. The research provides insights into the evolution of Arctic ecosystems and highlights the importance of understanding past adaptations to inform conservation efforts.
Scientists have discovered land-based evidence of ancient meltwater pulses from the Cordilleran Ice Sheet, shedding new light on climate change mechanisms. The findings suggest that additional climate forces were needed to kick-start ice-sheet retreat beyond energy changes in Earth's orbit.
Researchers found that melting ice sheets in North America and Greenland may have increased horizontal motion of plates by 25% and up to 40% at the Mid-Atlantic Ocean Ridge. This could lead to an increase in volcanic eruptions in Iceland.
Researchers analyzed three hearths in Ukraine's Epigravettian site, finding evidence of advanced fire use during the Last Glacial Maximum. The fires reached temperatures over 600°C, proving humans' control over pyrotechnics despite extreme environmental stresses.
A new study reveals significant shifts in prehistoric hunter-gatherer populations in Europe due to climate changes at the end of the last Ice Age. The population declined by half, but some areas in central Europe showed stability or even an increase in population size, indicating human migration towards the east.
Researchers from Utrecht University studied icebergs' routes during rapid ice cap deterioration and found evidence of ancient material from Antarctica near South Orkney Island. The study suggests that Antarctica had an ice cap in the late Eocene, and large icebergs could survive in warm ocean conditions.
Researchers used mitogenome data to discover many species colonized Aotearoa at the start of the Ice Age, likely from Australia. Iconic endemic birds, like Haast's eagle, are actually Ice Age arrivals, not recent immigrants.
Researchers used ancient plant DNA to study the impact of global warming on plant diversity and interactions. They found that temperature changes led to fundamental shifts in ecological conditions, with some plant species supporting each other during cold periods.
Researchers examined 16th-century written sources to understand climate change in Transylvania. The study found that hot weather was recorded more frequently than cold weather, with extreme events like floods and famines occurring due to climate variations.
A rare underwater fossil bed discovered by collectors in Florida's Big Bend region has preserved a unique window into the past. The site, dating back to the middle Irvingtonian North American land mammal age, offers insights into evolutionary transitions and speciation.
Researchers discovered signs of human remains being manipulated and dissected, indicating cannibalism among Late Ice Age societies in Central Europe. The findings suggest that cannibalism may have occurred due to conflicts over resources or territories, rather than necessity.
Researchers reconstructed past crop repertoires, showcasing how communities diversified their agriculture to ensure food security amidst changing environmental conditions. The study offers valuable lessons for modern agriculture, informing sustainable practices and policies in the face of greater climate variability.
A recent Colorado State University study demonstrates that climate change can affect earthquake frequency, as glaciers recede and slip along faults increases. This suggests that earthquake activity could increase as glaciers melt, impacting hazard assessment and seismology.
Scientists uncovered the first direct evidence that ancient Americans primarily relied on mammoth and other large animals for food. The study sheds light on both the rapid expansion of humans throughout the Americas and the extinction of large ice age mammals.
A recent study provides fresh insights into the ocean's role in climate during the Mid-Pleistocene Transition, a period of change that began about one million years ago. The research suggests that changes in the deep ocean played an equally important but nuanced role in driving climate cycles.
The study reveals large genomic differences between European aurochs, North Asian aurochs, and South Asian ancestor, with evidence of human intentional feeding and targeted domestication. The genome of the central European aurochs was fully decoded for the first time, providing insights into the history of wild cattle in Europe and Asia.
Research from multiple ice cores in Greenland provides new understanding of Dansgaard-Oeschger events, which represent 'tipping points' in Earth's climate. The findings suggest interactions between the Atlantic Meridional Overturning Circulation and wintertime sea ice play a key role in these events.
Researchers found that seven common European forest trees have preserved their genetic diversity over millions of years, defying expectations. This resilience is attributed to unique characteristics such as long generation times and pollen dispersal capabilities.
Researchers analyzed ancient human bones to assess puberty stages in 13 Ice Age teens, ages 10-20. Most entered puberty at 13.5 and reached adulthood between 17-22 years old.
A new study reveals that the Amazon's remarkable variety of plants and animals was shaped by woodlands and savannas connecting forest islands during the last Ice Age. The researchers used advanced climate and vegetation modelling techniques to provide a new understanding of the region's evolution.