Researchers at Johns Hopkins, writing in the journal Cell, have found that a single brain stem cell can produce two stem cells just like itself. "If we can somehow cash in on this newly discovered ...

Leishmaniasis is a parasitic disease that affects up to 1 million people worldwide each year. It is caused by the protozoan Leishmania, transmitted through the bite of a sandfly. Once inside its ...

In humans and other multicellular organisms, cells multiply. This defining feature allows embryos to grow into adulthood, and enables the healing of the many bumps, bruises and scrapes along the way.