All life is connected in a vast family tree. Every organism exists in relationship to its ancestors, descendants, and cousins, and the path between any two individuals can be traced. The same is true ...

Scientists have succeeded in reconstructing the family tree of cells in a developing mouse embryo. They recorded cells' relationships, starting when ...

Almost all animal species—including humans—have blood cells, but between different species our blood tells different stories. The lineage and components of blood cells vary widely, and this variety is ...

Audio will be available later today. Host Tavis Smiley talks with Rutgers University history professor Keith Wailoo about the social history of sickle cell anemia. NPR does not offer or accept money ...

T cells are vital for surveillance within the immune system. They are activated once the T cell receptor (TCR) binds its cognate peptide found in cell surface proteins encoded by the major ...