Birds possess unique skin appendages called feathers that are derived from the outermost layer of skin cells. Feathers are important for several functions, such as flight, temperature regulation, ...

When it comes to the stegosaurus, it might be very easy to tell the ladies from the gents. A new study of the dinosaurs’ ridges of fierce plates shows that males and females sported very different ...

This is a preview. Log in through your library . Abstract 1. Two often cited hypotheses explaining sexual head size dimorphism in lizards are: sexual selection acting on structures important in ...

Some Caribbean lizards' strong sexual dimorphism allows them to colonize much larger niches and habitats than they might otherwise occupy, allowing males and females to avoid competing with each other ...

Many animals go to extreme lengths to reproduce, developing sex differences — great and small — to woo members of the opposite sex and compete with rivals. This "sexual selection" is thought to be how ...

Body mass plays an important role in shaping an individual's behavior, especially with respect to dietary behavior. Larger animals tend to consume higher quantities of low quality foods. In contrast, ...

Researchers have found the development of the frontal sinus was affected more by sexual dimorphism than the ancestry of the individual and that it was the interplay between those two factors that ...

A new method to estimate sexual dimorphism in fossil species near the base of our family tree has been just published in the Proceedings of the National Academy of Science (PNAS), through the joint ...

It’s the seemingly basic question that has kept many a paleontologist up at night: How do we know which dinosaurs were male and which were female? For a number of years, paleontologists have suspected ...