The differences between the biogenic and abiogenic calcite in dinosaur eggshells: In the PLM images (A and E), biogenic calcite is dark, while abiogenic calcite is bright; On the IPF maps (B and F), ...
Osteopontin (OPN), key protein found in avian eggshells, is likely responsible for the shells' structure at the smallest scale and corresponding mechanical properties, like how hard certain layers are ...
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