The mystery of why birds’ eggs come in so many shapes has long been up in the air. Now new research suggests adaptations for flight may have helped shape the orbs. Stronger fliers tend to lay more ...

Mary Caswell Stoddard, an assistant professor in Princeton’s Department of Ecology and Evolutionary Biology, proposes a far-ranging hypothesis regarding how and why bird eggs acquire their shapes. Her ...

Kathryn MacRoberts, a small farmer with Laughing Duck Farm in Newcastle, shows chicken and quail eggs that she's collected as her barn cat gets in a peek in 2015. Lezlie Sterling [email protected] ...

Why do sea turtles, softshell turtles and snappers lay round eggs whereas pond sliders and many other turtles have elliptical eggs shaped more like those of a chicken? This question came up recently ...

One of nature's most efficient life-support systems is the egg. Eggs evolved over 300 million years ago as vertebrate animals adapted to living on land. And since then, they've taken on numerous ...

The eggs laid by birds come in an astonishing variety of shapes: ellipses in hummingbirds, spheres in owls, pointy ovoids in shorebirds and almost everything in between. Avian egg shape has fascinated ...

The eggs of amniotes - mammals, reptiles and birds – come in a remarkable variety of shapes and sizes. Evolutionary biologists have now addressed shape variety in terrestrial vertebrates' eggs, ...

Scientists may have finally discovered a sort of "Grand Unified Hypothesis" that explains what may determine the plethora of diverse egg shapes for all bird species A newly published study indicates ...

Paleontologists have found hen-sized, hen-shaped dinosaur eggs sticking out of ancient sandstone in Spain's Pyrenees mountains. The species that laid the 70-million-year-old eggs remains a mystery, ...