Museum Sinclair-Haus in Bad Homburg, Germany, opens “Tempo! All the Time in the World,” a group exhibition exploring the pace of natural cycles and “humanity as an initiator and victim of acceleration.” Among the highlights: American artists Tega Brain and Sam Lavigne’s Sleep Study (2021, image), a newly commissioned app and immersive installation that invites users to experiment with their own sleep cycles as a potential climate engineering technology.