Such efforts have led to the development of so-called "relaxed" molecular clocks, which allow the molecular rate to vary among lineages, albeit in a limited manner. There are currently two major ...

Historically, cell lineage tracing studies have taken large pools of cells from mature tissues and inferred their origins retrospectively by staining the cells with vital dyes or transplanting ...

Lineages unable to develop the required phenotype were eliminated and replaced by successful ones, creating conditions for selection to hone traits that are adaptive at the level of lineages.

A newly studied Vegavis iaai skull from Antarctica confirms that modern bird lineages, like ducks and geese, were evolving ...

The new findings contradict previous assertions that Ashkenazi mitochondrial lineages originated in the Near East, or from mass conversions to Judaism in the Khazar kingdom, an empire in the north ...

At Jamestown, Virginia, ancient DNA revealed the complex dog lineages between Indigenous dogs and the dogs brought by European settlers. Researchers from the University of Illinois Urbana ...