Classical demographic theory was developed to describe age-classified populations, in which knowledge of an individual's age accurately specifies its demographic state. In many species (e.g., plants, ...

Researchers have recently identified and described a new genus and species of xanthid crab found in Okinawa Island, Ryukyu Islands, Japan. Named Mabui calculus, it is the first among the 7,800 species ...

The female reproductive tract is required for the production of ova, secretion of sex hormones and the maintenance of pregnancy throughout the gestation of healthy offspring. Entry and advancement ...

The feminine mystique is not just figurative—it also extends to women’s reproductive anatomy. For decades women were excluded from research studies, leading to a dearth of information about female ...

Growing tissue from cells in a petri dish is hard enough, but growing multiple types of tissue, connecting them, and keeping them alive for weeks is even more daunting. A team led by Teresa K.