Researchers have developed a learning mechanism that uses the natural variability of neural activity—often dismissed as random “noise”—to understand how synapses buried deep inside brain networks—or brain-inspired devices—can adapt to improve the learning capabilities of the networks as a whole.Researchers have developed a learning mechanism that uses the natural variability of neural activity—often dismissed as random “noise”—to understand how synapses buried deep inside brain networks—or brain-inspired devices—can adapt to improve the learning capabilities of the networks as a whole.Hardware[#item_full_content]