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Study Suggests Earth’s Mantle May Contain an Ancient Ocean of Magma Formed Billions of Years Ago

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A groundbreaking study published in Nature on March 26 reveals that Earth’s mantle may harbor remnants of an ancient ocean of magma that formed around 4.4 billion years ago. This molten layer, situated near the boundary between Earth’s mantle and core, could be influencing the planet’s geological activity today, manifesting as unusual mantle anomalies. The research sheds light on the large-scale structures within the Earth’s interior, such as the Large Low-Velocity Provinces (LLVPS), which were identified using advanced seismic imaging techniques. These discoveries suggest that the formation of a magma ocean in Earth’s early history played a pivotal role in shaping the planet’s thermal and tectonic evolution.

The study, led by Assistant Professor Charles-Édouard Boukaré from York University, Toronto, proposes that the magma ocean, formed deep within Earth’s interior, could be affecting the thermal communication between the mantle and the core. This interaction, in turn, might influence the behavior of tectonic plates and the dynamics of Earth’s surface. According to Boukaré, this molten layer is a key element in understanding the current behavior of Earth’s geological processes, highlighting how ancient conditions continue to impact the planet today.

In their study, Boukaré and his team, including James Badro and Henri Samuel from French research institutions, combined geochemical and seismic data to develop a new model explaining how early crystallization in Earth’s interior led to the formation of this persistent magma ocean. The team proposes that dense, iron oxide-rich solids sank towards the core under extreme temperatures and pressures, remelting into a permanent ocean of magma. This model suggests that such a magma ocean formed regardless of how Earth’s mantle solidified, whether from the core outwards or vice versa, challenging previous assumptions about the planet’s internal evolution.

The lasting effects of this ancient magma ocean are believed to have shaped the internal structure of Earth, leaving a geological “memory” that continues to influence tectonic movements and mantle convection. The LLVPS, which date back over 4.4 billion years, are thought to be remnants of this primordial magma layer, providing a tangible link to the early history of the planet. Boukaré’s findings offer a fascinating glimpse into the Earth’s deep past, suggesting that the imprint of the magma ocean still affects geological processes, influencing the shape and dynamics of the planet as we know it today.

Looking beyond Earth, Boukaré is eager to expand the model to other rocky planets. His research could offer valuable insights into the formation of planets across the solar system, potentially revealing that magma oceans were not unique to Earth but may have been a common feature in the early history of other rocky worlds. This work could open new avenues in planetary science, helping scientists better understand the processes that shaped not only Earth but also its neighboring planets.

Evidence of Fire-Building Techniques in Europe During the Last Ice Age Discovered by Researchers

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Fire was a vital resource for survival during the Ice Age, providing heat, light, and a means for cooking and crafting tools. Despite its crucial role, evidence of well-preserved fireplaces from the coldest regions of Ice Age Europe had remained elusive—until recently. A groundbreaking study, led by researchers and published in the journal Geoarchaeology, sheds new light on how Upper Paleolithic humans managed fire during the Last Glacial Maximum, which occurred between 26,500 and 19,000 years ago. These findings, highlighted in a press release from the University of Vienna on April 14, 2025, reveal that Ice Age individuals employed sophisticated fire-building techniques to survive the extreme conditions of the period.

The research team, led by archaeologist Philip R. Nigst from the University of Algarve and the University of Vienna, set out to uncover the mysteries surrounding fire use in the Ice Age. Their analysis of three hearths found at a prehistoric site along the Dnister River in Ukraine revealed that humans of the Last Glacial Maximum did not rely on a single method for making fire. Instead, they created a variety of hearths and employed materials like wood, bones, and fat—not only to ignite flames but also to sustain them in freezing temperatures. Charcoal analysis indicated that spruce wood was commonly used, highlighting the resourcefulness of these early humans in utilizing the materials at their disposal.

The study, which was published on April 1 in Geoarchaeology, provides compelling evidence of advanced fire-making techniques. The team conducted several types of analysis, including micro-stratigraphic, colorimetric, and micromorphology analysis, to study the hearths in detail. One particularly fascinating discovery was that one of the fires reached temperatures exceeding 650 degrees Celsius, suggesting that those who built the hearths had a sophisticated understanding of pyrotechnics, even in the harshest of environments. However, one of the scientists, Marjolein D. Bosch, a zooarchaeologist, raised the question of whether the animal bones burned at such high temperatures were intentionally used as fuel or if the burning was an incidental occurrence.

The study also reveals that the design of these fireplaces was carefully thought out and tailored to different seasons. One hearth, in particular, appeared larger and more robust, indicating that it was built to withstand higher temperatures. These findings suggest that Ice Age hunter-gatherers adapted their fire-making strategies to suit the varying conditions of the year. However, questions remain about why such evidence of fireplaces is so scarce, given their significance. The researchers speculate that freezing and thawing cycles may have destroyed much of the evidence. Additionally, Nigst points out that managing fuel during the Last Glacial Maximum would have been a significant challenge, potentially leading to the use of alternative technological solutions. As research continues, the team hopes to gain further insight into the role of fire in human evolution and how it may have contributed to the dominance of our species during such a harsh era.

Stone Age Beliefs Tied to Ancient Amber Bear Figurine Unearthed in Poland

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In 1887, workers digging through a peat bog made a remarkable discovery — a small carved amber bear, believed to date back to the Stone Age. Thought to have been worn as a protective charm, the bear reflects the reverence early humans had for the powerful and fearsome animal. This artifact was later affectionately named “Słupcio,” meaning “little guy from Słupsk,” by a Polish kindergartner who won a naming contest. Today, the amber bear is displayed at the National Museum in Szczecin, located about 220 kilometers from where it was originally found.

The discovery of Słupcio ties into broader archaeological findings from the Pomerania region along the southern Baltic Sea. During the Stone Age, most people lived as hunters, leaving behind few traces of their daily lives. However, sites along the Baltic coast have revealed an array of tools, pottery, and amber objects washed ashore. A 2023 study by archaeologists Daniel Groß and Peter Vang Petersen uncovered several similar amber bear figurines, suggesting these objects date back to the Paleolithic era — between roughly 50,000 and 12,000 years ago — highlighting a longstanding tradition of animal representation in prehistoric cultures.

Słupcio’s journey through history is just as fascinating as its ancient origins. At the end of World War II, the artifact, along with many others, was taken from Poland by German forces and housed in the Stralsund Museum. It remained there for decades until its eventual return to Szczecin in 2009. In Germany, it was referred to as “Bernsteinbär,” meaning “amber bear,” and scholars confirmed its ancient roots. Despite being discovered over a century ago, debates about the exact age and origin of the carving continue to intrigue experts.

Today, the amber bear has become a beloved cultural symbol. Measuring 10.2 centimeters in length, 4.2 centimeters in height, and weighing 85 grams, the figurine features a hole through its midsection — likely used to string it as a necklace or attach it to clothing or gear. The material’s translucent glow when polished and its distinct fragrance when burned gave amber a mystical quality, turning it into a Stone Age amulet believed to hold protective powers. The bear not only represents ancient craftsmanship but also offers a glimpse into the spiritual beliefs of early humans navigating a world filled with powerful natural forces.