The brain’s ability to learn comes from “plasticity,” in which neurons constantly edit and remodel the tiny connections called synapses that they make with other neurons to form circuits. To study plasticity, neuroscientists seek to track it at high resolution across whole cells, but plasticity doesn’t wait for slow microscopes to keep pace, and brain tissue is notorious for scattering light and making images fuzzy. In an open access paper in Scientific Reports, a collaboration of MIT engineers and neuroscientists describes a new microscopy system designed for fast, clear, and…