The relatively narrow human birth canal presumably evolved as a 'compromise' between its abilities for parturition, support of the inner organs, and upright walking. But not only the size of the birth ...

Scientists have developed a new model to study an early stage of human development, using human embryonic stem cells. Scientists from the University of Cambridge, in collaboration with the Hubrecht ...

Scholars often explain that human immaturity and lengthy childhoods came about because of the need for cultural learning—the manners, mores, and conventions of a particular culture. Surely culture is ...

BACKGROUND The frequency of twin births has increased dramatically since the 1970s in nearly all developed countries. This upsurge poses a public health challenge because multiple pregnancies are ...