Jonathon Keats has been described by The New Yorker as a “poet of ideas.” Keats’s latest project is the Millennium Camera, a custom-built pinhole camera with a one-thousand-year exposure time that will remain inside Amherst College’s Stearns Steeple until 3015. In May 2015, the college’s Mead Art Museum documented the intellectual and material creation of Keats’s camera, displaying its blueprints and predecessors alongside the camera itself in an exhibition titled Jonathon Keats: Photographing Deep Time. To commemorate the opening of the exhibition, Keats spoke with Vanja Malloy, the Mead’s curator of American art, about deep-time photography and about the rapidly changing nature of humanity’s relationships with its environment and its descendants. This essay has been adapted from that conversation.