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Unik DNA-analyse af uddødt ullnæsehorn i ulvmave
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Forskere ved Swedish Centre for Palaeogenetics har analyseret DNA fra et uddødt ullnæsehorn fundet i maven på en frossen ulveunge. Opdagelsen, den første af sin art fra istiden, giver nye spor om artens udryddelse. Analysen tyder på, at klimaforandringer sandsynligvis forårsagede neshornets forsvinden frem for menneskelig jagt.
A new study reveals that shifts in Antarctic Bottom Water circulation around 18,000 to 10,000 years ago drove the release of stored carbon into the atmosphere, contributing to the warming at the end of the last Ice Age. Researchers analyzed sediment cores to trace these changes, highlighting the Southern Ocean's role in the global carbon cycle. The findings suggest implications for modern Antarctic ice melt and climate projections.
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Fresh imagery from ESA's Mars Express orbiter has exposed signs of a past ice age in the Coloe Fossae region of Mars. These features include glacial-like patterns in valleys and craters, hinting at climate shifts that spread ice far from the poles. The findings suggest this icy period ended as recently as 500,000 years ago.