Some parts of our bodies bounce back from injury in fairly short order. The outer protective layer of the eye—called the cornea—can heal from minor scratches within a single day. The brain is not one ...

The navigation of stem cells and progenitors to sites of tissue growth, the long-range extension of neuronal projections, and the large-scale movement of cells up or down external gradients all ...

Established by Article I of the Constitution, the Legislative Branch consists of the House of Representatives and the Senate, which together form the United States Congress. The Constitution grants ...