“We were not expecting anything interesting, but it turned out to be the first fossil bird ever found with an egg inside its body,” says lead study author Alida Bailleul, a postdoctoral ...

Unlaid eggs may be coated with a second layer, or sometimes more, of shell. This abnormality has also been documented in sauropod dinosaurs, and in fossil and living turtles.

A group of scientists in Gansu province have discovered a fossilized bird dating back about 110 million years and the first ever to have an unlaid egg in its abdomen. The fossil represents a new ...

Scientists have discovered the first fossil bird ever found with an egg preserved inside its body, a new study reports. The 110-million-year-old bird is a new species called Avimaia schweitzerae ...

Physical characteristics of eggshell (such as thickness and pore density) can also reveal information about egg size, bird size, the nesting environment, nesting behaviour, and can sometimes be used ...

Birds that lived at the time of the dinosaurs might have been too heavy to sit on clutches of eggs without breaking them, according to an analysis of primitive avian fossils.

Yet this doesn’t mean that early fossil birds were exactly like their living kin. ... such as arthropod, amphibian egg, or plant fossils – can’t be ruled out just yet.

The colors of modern bird eggs derive from just two pigments: biliverdin and protoporphyrin IX. The researchers detected both pigments in their fossil eggshell samples.

Seventy-five million years ago in southern Alberta, a river flooded, burying the eggs of bird-like dinosaurs nesting on the nearby plain. Now, tiny pieces of those fossil egg shells offer new ...

Chemical analysis of troodon eggshells show bird-like and reptile-like traits. Seventy-five million years ago in southern Alberta, a river flooded, burying the eggs of bird-like dinosaurs nesting ...

Zhao Bi blows the dust off dinosaur egg fossils at the Qinglong Mountain Dinosaur Egg Fossil Site Museum in Shiyan, Hubei province, in May (WU ZHIZUN / XINHUA) Tyrannosaurus rex, a dinosaur with a ...

Researchers said the fossil flamingo egg found at Santa Lucía likely dates back to between 12,000 and 8,000 years ago. The egg in question measures under 4 inches in length and has a maximum ...