The calcitic layers of the eggshells of archosaurs (including crocodilians and birds) and turtles are composed of distinctive crystalline structures known as eggshell units. Those growing from the ...

An international team of scientists unearthed a remarkable diversity of fossil eggshells in Utah's Cedar Mountain Formation, challenging long-held assumptions about the prehistoric ecosystems of ...

New atomic-force microscopy images and electron microscopy measurements have revealed that the nanostructure of the chicken eggshell changes during egg incubation, going from being very hard and ...

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), ...