By analyzing the arrangement of vertebrae in the spines of nearly 400 species of tetrapods—a group of animals with four limbs ...

Chimpanzees are often cast as a mirror to our darkest tendencies, embodying violence, territoriality and power struggles. In ...

Could hormone variations throughout the menstrual cycle make players more vulnerable to serious knee injuries? That’s what a ...

The natural world is home to a wide range of species that have each adapted to exist in various habitats through their unique characteristics, behaviors, and interactions. In this lesson, students ...

Flat-faced dogs and cats have been bred to such extremes that they now look more like each other than their own ancestors, ...

Other factors can also contribute to variations ... experience health conditions related to intersex anatomy that need to be addressed. For example, if you have a uterus but no uterine opening ...

A healthy person can have some minor variations in the diaphragm's anatomy. For example, the left or right side may be slightly higher or lower without affecting physical functions. During pregnancy, ...

A number of anatomical variations can occur with the recurrent laryngeal nerve, either on one or both sides of the voicebox and airway. In some people, for example, the RLN provides innervation to ...

Environmental information links allow species to adapt their movements and behaviours in response to signals from their surroundings, including climate cues or temperature variations. Examples ...