Why This 110-Million-Year-Old Bird Still Had an Unlaid Egg
Microscopy of Early Cretaceous bird Avimaia schweitzerae reveals abnormal double eggshells and medullary bone tying avian reproduction to dinosaurs.
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Microscopy of Early Cretaceous bird Avimaia schweitzerae reveals abnormal double eggshells and medullary bone tying avian reproduction to dinosaurs.
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