Neanderthals: Sheltering in Caves Grégoire Sirade/Science Photo Library
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In early January, the chill in south-west England can be quite biting. Though my Canadian and Scandinavian friends might chuckle at my discomfort, it’s cold enough for me to feel it in my bones without proper attire.
This stark cold evokes thoughts of our long-extinct relatives, the Neanderthals. Common portrayals often cast them in freezing landscapes reminiscent of Siberia — with icy winds and woolly mammoths roaming the snow. They’re typically seen as hominins well-adapted to frigid conditions.
<p>Yet, if you’ve been following the *New Scientist*, you might recall hints suggesting otherwise. November brought an intriguing article titled "Neanderthals' Big Noses Weren't Adapted for Cold Climates."</p>
<p>Chris Sims discussed the first analysis of Altamura Man, a well-preserved Neanderthal from Italy. Despite prior beliefs, this specimen lacked specialized nasal structures previously thought essential for warming inhaled air, leading researcher Todd Ray to assert that the notion of Neanderthals thriving in icy climates is "absolute nonsense." He emphasized, "They likely suffered from the cold just like we do."</p>
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<p>Similarly, in December, we uncovered evidence that ancient humans began mastering fire by striking flint against pyrite, dating back 400,000 years in southern England. This predates Neanderthals and hints at their probable innovation in fire-starting, particularly as their bodies were not tailored to endure Britain's chill.</p>
<p>If Neanderthals were not primarily adapted for cold climates, what environments did they actually inhabit? Emerging research published in the <em>Journal of Archaeological Science: Reports</em> unveils a fascinating narrative of Neanderthal existence.</p>
<h2>Southern Refuge: The Neanderthal's Habitat</h2>
<p>Among all extinct human species, Neanderthals are our closest relatives. They thrived across Europe and western Asia for countless millennia until their disappearance around 40,000 years ago, coinciding with the significant expansion of our species into Europe.</p>
<p>The long history endured by Neanderthals saw them through several ice ages, characterized by fluctuating climates and shifting ice sheets. They lived during periods when the Earth's magnetic field changes potentially increased their exposure to harmful UV radiation. Compelling evidence indicates that Neanderthals engaged in artistic expression and had cultural practices surrounding death, such as structured burials.</p>
<p>Over time, however, Neanderthal habitats diminished. Fascinatingly, they withdrew from Asia and northern Europe, ultimately being confined to southern Europe, especially the Iberian Peninsula (modern-day Spain and Portugal). Recent studies focus on this southern region, where Neanderthals exhibited remarkable longevity.</p>
<p>Let’s examine a significant study by Loic Lebreton and his team at the Catalan Institute of Human Paleoecology and Social Evolution in Spain. They analyzed small mammals (nicknamed "micromammals") as climate indicators. Warm, humid environments support a greater diversity of wildlife compared to cold, arid areas. Their research indicated that northeastern Spain maintained a stable, warm climate from 215,000 to 10,000 years ago, heavily influenced by the Mediterranean, unlike the more variable conditions in southern France and northern Italy, plausibly contributing to the prolonged survival of Neanderthals in Spain.</p>
<p>Research led by Sarah Barakat from the University of Aberdeen suggests that vast forested areas likely covered much of the Neanderthal habitat. At <a href="https://doi.org/10.1016/j.jasrep.2025.105456">Lazaretto Cave</a>, home to Neanderthals between 190,000 and 130,000 years ago, remains of aurochs, red deer, ibex, and gray wolves have been found. Examination of their teeth indicates herbivores primarily consumed woody plants, suggesting a richly forested environment with some grassland.</p>
<p>Coba del Geganto, a cave near Barcelona, offers additional insight into the Neanderthal ecosystem. Dating from 145,000 to 24,700 years ago, the site contains evidence of numerous bird species typical of woodlands and scrublands, alongside some that currently inhabit only northern regions, indicating migration patterns during colder periods.</p>
<p>Although direct evidence of Neanderthals hunting these birds is lacking, analysis of the bones found may point to their dietary habits. Research into animal remains would clarify whether Neanderthals utilized specific species within this cave ecosystem.</p>
<h2>The Final Days of Neanderthals</h2>
<p>As the Neanderthal epoch approached conclusion, they displayed remarkable adaptability. Rosa Albert and her colleagues studied the Liparo Los Curciuto site in southern Italy's Ginosa Valley, which recorded Neanderthal activity from 55,000 to 42,800 years ago. Geological formations reveal shifting conditions from forest coverage to more open grasslands, driving Neanderthal adaptations in foraging and fire use.</p>
<p>Even by 41,000 years ago, certain Neanderthal groups thrived, despite their relatives disappearing from large portions of Eurasia. Research at <a href="https://doi.org/10.1016/j.jasrep.2025.105149">Cova Eiros in northwestern Spain</a> documented diverse animal remains, including significant numbers of red deer and cave bears, shedding light on their dietary patterns.</p>
<p>Findings indicated that 5.5 percent of the bones exhibited Neanderthal marks, suggesting their consistent interaction with the environment, including instances of consuming cave bear remains.</p>
<p>Fellow researchers discovered similar patterns at <a href="https://doi.org/10.1016/j.jasrep.2025.105457">Covallejos</a>, another northern Spanish cave, indicating Neanderthals exploited a variety of food sources, including red deer and large herbivores.</p>
<p>What ultimately led to their extinction? Research by Liz Charton and team at France's Institute of Human Paleontology indicates various environmental stressors. Analyzing marine sediment core samples from the western Mediterranean, they traced dramatic climatic shifts between 41,000 and 34,000 years ago. The increase of grassland and semi-arid vegetation aligns with previous findings of substantially drier conditions.</p>
<p>This research mapping known hominin sites during this period shows a decline in Neanderthal tool usage as modern human artifacts became more prevalent. Although Neanderthals likely retreated to southern regions, they faced increased competition from modern humans.</p>
<p>This doesn’t imply that desiccation singularly led to their extinction; Neanderthals had previously navigated similar environmental challenges and survived. However, this factor, among others, likely contributed to their decline.</p>
<p>In investigating Neanderthal culture, Nohemi Sala and colleagues at Spain's National Center for Human Evolution Research analyzed burial practices at <a href="https://doi.org/10.1016/j.jasrep.2025.105316">46 sites on the Iberian Peninsula</a>. Evidence for deliberate burials can be found in various locations, yet none have been documented in Spain or Portugal.</p>
<p>This does not exclude the possibility that Iberian Neanderthals had unique mourning practices or ideas about honoring the deceased. At Sima de las Palomas, multiple Neanderthals were discovered within a vertical cave; one individual, lying in a specific position, suggests intentional placement. Such sites may have served as natural burial grounds.</p>
<p>Moreover, evidence indicates that Iberian Neanderthals might have engaged in ritualistic cannibalism, reflecting the varying cultural significance of death across societies.</p>
<p>Interestingly, Neanderthal funerary customs appear to have diversified over the last 10,000 years, potentially as a result of migrant waves introducing new practices.</p>
<p>While it’s disheartening that despite their innovation and adaptability, Neanderthals faced extinction, their genetic legacy persists in many of us today, highlighting a genetic and cultural exchange with modern humans.</p>
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Source: www.newscientist.com
