Calcified eggshells protect developing embryos against environmental stress and contribute
to reproductive success. As modern crocodilians and birds lay hard-shelled eggs, this …

One of the fossil record's most puzzling features is the absence of preserved eggs or
eggshell for the first third of the known 315 million year history of amniote evolution. Our …

Exceptionally preserved sauropod eggshells discovered in Upper Cretaceous (Campanian)
deposits in Patagonia, Argentina, contain skeletal remains and soft tissues of embryonic …

Definitive non-avian dinosaur embryos, those contained inside fossil eggs, are rare,. Here
we describe the first known unequivocal embryonic remains of sauropod dinosaurs—the …

Avian (and formerly dinosaur) eggshells form a hard, protective biomineralized chamber for
embryonic growth—an evolutionary strategy that has existed for hundreds of millions of …

Although dinosaur eggs were first discovered and identified in the late 1800s, limited
attention was given to the scientific value of oological fossils in contrast to observations …

The direct relationship between eggshell structure and eggshell formation is well
established for avian eggs, but has never been studied in depth in non-avian dinosaurs …

Birds are the only living amniotes with coloured eggs,,–, which have long been considered
to be an avian innovation,. A recent study has demonstrated the presence of both red-brown …

Phosphatized microfossils in the Ediacaran (635–542 Myr ago) Doushantuo Formation,
south China, have been interpreted as the embryos of early animals,,,. Despite experimental …

Fossil dinosaur embryos are surprisingly rare, being almost entirely restricted to Upper
Cretaceous strata that record the late stages of non-avian dinosaur evolution,. Notable …