Ricki Lewis | Jun 29, 2003 | 10+ min read
Courtesy of Eric D. Laywell SPHERES OF PROMISE These neurospheres, clusters of cells in culture derived from the CNS of mice, are stained with antibodies against a neuronal protein (red), and a astrocyte protein (green). They have a nuclear counterstain (blue). The brain and spinal cord were once considered mitotic dead ends, a division of neurons dwindling with toddlerhood, with memory and learning the consequence of synaptic plasticity, not new neurons. But the discovery of neural stem