Life cycles require the creation of an autonomous individual, that individual’s growth and that individual’s reproduction In sexual reproduction, gametes containing a single set of chromosomes combine ...

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 ...

Men holding high positions within a hierarchical organisation have more offspring than those in other positions within the same organisation. This unexpected result, published this week in Ethology, ...

Most animals, including humans, carry an internal lunar clock, tuned to the 29.5-day rhythm of the moon. It guides sleep, reproduction and migration of many species. But in the age of artificial light ...

When Homo sapiens and Neanderthals interbred, a genetic variation affecting red blood cells may have hindered reproduction in ...

Many mountain gorillas keep living - vigorous and socially engaged - for a decade or more beyond the years of reproduction.

A study based on a review of genetic and health information from more than 276,000 people finds strong support for a decades-old evolutionary theory that sought to explain aging and senescence. A ...

Associated Press WriterWASHINGTON (AP) -- Cloning human beings for the purpose of reproduction is medically unsafe and should be banned but cloning to treat diseases should be allowed, a National ...