Resting brain stem cells hardly differ from normal astrocytes, which support the nerve cells in the brain. How can almost identical cells perform such different functions? The key lies in the ...

Illustration showing a transplanted nerve cell (gold) using its internal compass (code) to find its partner nerve cells in the brain and spinal cord (green). Some parts of our bodies bounce back from ...

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 ...