When people donate blood, stem cells in the bone marrow make new blood cells to replace what was lost. This stress can drive the selection of certain clones—groups of blood cells with a slightly ...

Know your enemy, know yourself. It’s a centuries-old strategy. But even in the present-day war against cancer, achieving it remains elusive. In many cases, cancer cells blend in with healthy ones.

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 ...