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 ...

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 ...

Modern pinnipeds (the group that includes seals, sea lions and walruses) show a range of sexual dimorphism (large differences in size between males and females) and mating systems that span the ...

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 ...

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, ...

(A) Relative urinary cystine concentration of Slc3a1 KO and WT mice from both sexes. (B) Typical hexagonal cystine crystals from the urine of Slc3a1 KO and WT mice. Scale bar,100 μm. (C) Bladder ...