Cartilage is the body’s most stubborn tissue. Once it wears away, it’s usually gone for good. This biological dead-end is the ...

Scientists discover how aging alters the function of cells, called mesenchymal drift, and manage to reverse this process.

Researchers are learning how to refill the energy reserves of aging human cells, turning a long-standing metaphor about “cellular batteries” into a literal engineering challenge. By training healthy ...

The brain is shielded from many substances by the blood-brain barrier, but this shield is not impenetrable. There are immune cells in the brain called microglia that can respond to potential invaders ...