Explore how frogs, axolotls, and other amphibians use cutaneous respiration to absorb oxygen directly through their skin.

Tadpole species that lost their lungs through evolution never re-evolve them, even when environmental change would make it ...

Ptychadena nana individuals with green and brown color morphs. Image courtesy of Sandra Goutte. A team of researchers at NYU Abu Dhabi (NYUAD) has uncovered how a common color variation in frogs has ...

Even within a single species, animals don't all respond in the same way to environmental changes. A new study of reed frogs ...

Rensch’s rule suggests that sexual size dimorphism (SSD) increases with species size when males are the larger sex, whereas it decreases when females are the larger sex. However, the process ...

On a mountain in southern China, a “strong”-armed creature with yellow fingertips perched in a bamboo forest. Its “large” brown eyes scanned the surrounding plants, but it wasn’t the only one looking ...