The contents of the last meal consumed by the earliest animals known to inhabit Earth more than 550 million years ago has unearthed new clues about the physiology of our earliest animal ancestors, according to scientists from The Australian National University (ANU). Ediacara biota are the world’s oldest large organisms and date back 575 million years. ANU researchers found the animals ate bacteria and algae that was sourced from the ocean floor. The findings, published in Current Biology, reveal more about these strange creatures, including how they were able to consume and digest food. The scientists analysed ancient fossils containing preserved phytosterol molecules -- natural chemical products found in plants -- that remained from the animals’ last meal. By examining the mol...
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