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Scientists drilled a 228-meter core under West Antarctica, finding marine fossils that show the ice sheet collapsed in past warm periods, raising sea levels by up to five meters.
Scientists have retrieved a 228-meter sediment core from beneath the West Antarctic Ice Sheet at Crary Ice Rise, the deepest ever drilled, revealing evidence that the region was once open ocean during past warm periods.
Fossils of marine organisms indicate the ice sheet likely collapsed when global temperatures were higher, contributing up to five meters of sea level rise.
The core, collected after two failed attempts and transported over 1,100 km to New Zealand, spans millions of years and will help refine climate models to predict future ice loss and sea level rise.
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Los científicos perforaron un núcleo de 228 metros debajo de la Antártida Occidental, encontrando fósiles marinos que muestran que la capa de hielo se derrumbó en períodos cálidos pasados, elevando el nivel del mar hasta cinco metros.