Before revision:  The unexpected link between adaptation and oscillation is shown to underlie several known examples of dynamical quorum sensing , and as such may also be a source of inadvertent group behaviour in large populations of URLanisms.
After revision:  The unexpected link between adaptation and oscillation is shown to underlie several known examples of dynamical quorum sensing in several cellular systems with increasing biological complexity reaffirms the pivotal role of adaptation in powering oscillations in an otherwise dissipative cell-to-cell communication channel. The physical conditions identified can be used to design synthetic oscillatory systems