The eye has three coats (sclera–cornea, uvea, and retina) and two humors (aqueous and vitreous). The conjunctiva covers the visible portion of the sclera (bulbar conjunctiva) and lines the eyelids ...

Koala health is critically influenced by retroviral infections, notably the koala retrovirus (KoRV), which exists in both exogenous and endogenous forms. This retrovirus is unusual in that it is ...