Working with international dendrochronologists, conceptual artist Anna Von Mertens culled source images of tree ring cross-sections from studies connecting climate variability and periods of human instability. The events represented in her quilts correlate to periods of drought recorded by the tree rings. Fading thread colors mirror and highlight historical events. The exhibit takes place at The Arnold Arboretum, and is free. For more information visit https://arboretum.harvard.edu/events/