Scientists have engineered the first fully human-made bone marrow system, recreating the complex mix of cells, vessels, and nerves that normally live deep within our bones. This breakthrough lets ...

University of Cambridge scientists have used human stem cells to create three-dimensional embryo-like structures that replicate certain aspects of very early human development—including the production ...

When the medical world was agog over the discovery that blood circulates through the body, imaginative surgeons tried to transfuse sheep’s blood into human patients weakened by too generous ...