Alexis Rider’s contribution to the “Ways of Water” series argues for the utility of imaging ice as a rock, and not just frozen water. From glaciers to icebergs to the way layers of ice sheets have shaped landscapes (including New York City), the study of ice—as both a force and as a preserver of the past—opens temporal windows on long-term changes in both geology and society. Rider takes us from early expeditions of Antarctica to the present, in which “rocky ice” is “an interlocutor for the climate crisis.”