The human genome is made up of 23 pairs of chromosomes, the biological blueprints that make humans … well, human. But it turns out that some of our DNA — about 8% — are the remnants of ancient viruses ...

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 ...

Stem cells are precursors of a variety of different cells: They can turn into anything from blood to bone to muscle. Human blood stem cells, known as hematopoietic stem cells, are the forerunners of ...

The World Bank drives early childhood development globally through financing, policy, and partnerships to boost health, learning, and equity.

Add Yahoo as a preferred source to see more of our stories on Google. Our DNA contains remnants of ancient viruses that embedded themselves into our genetic code. - TanyaJoy/iStockphoto/Getty Images ...