For a long time, having children has been a young person’s game. Although ancient records are sparse, researchers estimate that, for most of human history, women most typically conceived their first ...

The mice scurrying around their cage in Katsuhiko Hayashi’s laboratory do not look remarkable. They run, eat and sleep like others of their kind. But these eight rodents have an unusual origin story, ...

Humans are sexual, meaning that both a male and a female are needed to reproduce. Each is equipped with specific organs capable of producing specific cells needed to procreate. In conjunction with a ...

Göran Therborn does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...