Haematopoietic stem cells are progenitor cells that have the ability to both generate all types of blood cells, including those of the myeloid and lymphoid lineages, and to replace themselves. In ...

ANN ARBOR—For a long time, evolutionary biologists have thought that the genetic mutations that drive the evolution of genes and proteins are largely neutral: they're neither good nor bad, but just ...

New research challenges the long-standing idea that most fixed genetic mutations are neutral. For many years, scientists studying evolution have believed that most genetic changes influencing how ...

Gowans, J. L., Gesner, B. M., and McGregor, D. D., in Biological Activity of the Leucocyte (Ciba Foundation Study Group No. 10), 32 (London, 1961). Gowans, J. L., Ann ...

Planting trees has quickly emerged as a seemingly simple way to soak up carbon emissions. Everybody likes it: Environmentalists, politicians, and corporations alike are pushing for a rapid expansion ...

The international career of Zimbabwe batsman Sean Williams appears to be over after he admitted struggling with drug addiction. The 39-year-old Williams recently made himself unavailable for national ...