Stem cells are pretty ubiquitous in the body, appearing in many different organs and tissues including the brain, blood, bone marrow, muscle, skin, heart, and liver tissues. In these areas, they lie dormant until needed to regenerate lost or damaged tissue.

NASA, which stands for the National Aeronautics and Space Administration, is the United States government agency responsible for the nation's civilian space program and for aeronautics and aerospace research. Established on July 29, 1958, NASA has played a pivotal role in shaping humanity's understanding of space and our place in the cosmos. With a rich history spanning over six decades, NASA has consistently pushed the boundaries of human knowledge, scientific discovery, and technological innovation.