Sexual bulges in primates have long sparked debate about their function - do they reliably indicate female fertility, or do they deceptively blur it? Here, we provide evidence that female primates can manipulate sexual swellings to outwardly indicate fecundity while inwardly failing [...].
"Orangutan life cycle: slow but sure" Among our closest extant relatives, the life of orangutans remains the least documented and understood, mainly due to their solitary lifestyle. Based on a 15-year study of Bornean orangutans (Pongo pygmaeus wurmbii), our research aims to [...]