Fossils have long been a window into the past, but most discoveries have focused on DNA. A new study published in Nature shows that fossilized bones also preserve metabolites—tiny molecules linked to metabolism, diet, and disease.
Researchers analyzed bones from animals that lived between 1.3 and 3 million years ago in Tanzania, Malawi, and South Africa. Using mass spectrometry, they detected thousands of metabolites preserved inside the bone structure. These findings provide unprecedented insights into how ancient animals lived and what their environments looked like.
Key discoveries include:
Climate clues: Evidence suggests the prehistoric world was hotter and wetter than today.
Disease traces: A 2-million-year-old ground squirrel fossil showed signs of infection by Trypanosoma brucei, the parasite that causes sleeping sickness.
Diet signals: Metabolites revealed that animals consumed plants like aloe and asparagus, helping scientists reconstruct local vegetation and climate conditions.
Environmental reconstruction: By linking plant metabolites to specific ecological conditions, researchers can now build detailed pictures of ancient habitats.
This approach, called palaeometabolomics, could revolutionize how scientists study the past. Instead of relying only on DNA, they can now use chemical fingerprints to understand ancient ecosystems with the precision of modern field ecology.
Source
Discover Magazine – Hidden Molecules in Animal Fossil Reveal How the Ancient World Looked
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