Marking the 25th anniversary of two papers reporting the first isolation of mouse ES cells, which led to the development of the first knockout mice and heralded a revolution in developmental biology and genetics, Nature is releasing a Special Stem Cells Issue. The special issue is featuring papers that show the progression of ES cell research. Access the FREE content online through the special Web Focus: 25 years of Embryonic Stem Cells.

Or if you don't have time just now, download the Nature Podcast Special: Stem Cells, and listen at your leisure.