We experimentally demonstrate the use of a single electronic spin to measurethe quantum dynamics of distant individual nuclear spins from within asurrounding spin bath. Our technique exploits coherent control of the electronspin, allowing us to isolate and monitor nuclear spins weakly coupled to theelectron spin. Specifically, we detect the evolution of distant individualcarbon-13 nuclear spins coupled to single nitrogen vacancy centers in a diamondlattice with hyperfine couplings down to a factor of 8 below the electronicspin bare dephasing rate. Potential applications to nanoscale magneticresonance imaging and quantum information processing are discussed.
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