Here I will discuss how gravitons – the expected quanta of gravity – can be detected. For decades the conventional wisdom was that detecting a single graviton would require something like a Jupiter-sized detector orbiting a neutron star. I will explain how a far more efficient detection process, involving the full mass quadrupole of a macroscopic system and energy sensing, circumvents these earlier estimates, bringing graviton detection within reach of laboratory-scale experiments. I will also discuss why, despite not being able to rule out all semiclassical alternatives, graviton detection offers an opportunity to directly test predictions of linearized quantum gravity, and how the counting statistics of gravitons in gravitational waves can be explored experimentally.