Episode Details

Australian scientists have cracked a mystery buried in underwater caves, discovering that submerged bones carry unique chemical fingerprints revealing how they got there and how they’ve survived centuries. Focusing on caves near Mount Gambier, researchers found wet, lightless caves preserve bones far better than dry ones—keeping structure and chemistry intact while shielding them from decay. Led by PhD candidate Meg Walker, this breakthrough offers the first framework for interpreting underwater fossils, helping scientists reconstruct ancient ecosystems and understand why megafauna like giant wombats vanished. Published in PLOS One, this new method could revolutionize how we trace climate change’s impact on life through history.

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