A number of projects propose architectural solutions. In the Rwanda Institute for Conservation Agriculture, by MASS Design Group (winners of a 2017 National Design Award), landscape and architecture help train young people to be leaders of conservation agriculture, employing the One Health concept, which links human, animal, and environmental health. The Monarch Sanctuary, a project by Mitchell Joachim and Vivian Kuan of the nonprofit research group Terreform ONE, proposes a New York building with a double-glass facade. Inside the cavity between its two skins is a 30,000-square-foot sanctuary—in the form of a vertical meadow with regulated temperature and humidity—where threatened butterflies can breed during their annual migration.

The exhibition includes numerous ­examples of materials research. The Bio­receptive Concrete Panels by London-based Marcos Cruz, Richard Beckett, and Javier Ruiz are made of concrete with a low pH that supports the growth of small plants like moss, without requiring expensive irrigation. Fantasma, a long garment made of glowing transgenic silk, demonstrates how nature, craft, and engineering can amplify each other. The piece, a product of Japanese art and science, was created by the Tokyo design studio AnotherFarm, the Tsukuba-based National Agricultural and Research Organization, and the Kyoto-based textile manufacturer Hosoo; the silk has been engineered by injecting silkworm eggs with coral DNA so that it glows. And the designer Fernando Laposse’s Totomoxtle is a new material made from the variously (and richly) colored husks of heirloom Mexican corn, a crop threatened by industrial agriculture in that country. The husks are pressed onto a paper or textile backing, and cut into small pieces to create a marquetry that can be used for furniture or interior surfaces, like the wall panels in the exhibition.

One of the Triennial’s most intriguing combinations of design and bioengineering is the Origami Membrane for 3D Organ Engineering, a collaboration between the inventor Chuck Hoberman and researchers at the interdisciplinary Wyss Institute for Biologically Inspired Engi­neer­ing at Harvard, including Richard Novak, Elizabeth Calamari, Sauveur Jeanty, and Donald Ingber, the institute’s founding director. An inflatable foldable-membrane structure is filled with hydrogels that contain organ cells, and is now being tested on kidney cells, for use outside the body as a portable dialysis device.

Among the more conceptual projects, the Madrid-based Ensamble Studio’s Petrified River, which is set in the museum’s garden, is a composition in concrete—a “hill” and a “pond,” with a 40-foot “river” between them—that is a metaphor for what the architects call “the rich landscape that Manhattan once was, when it was known as Mannahatta or ‘island of many hills.’ ” An equally poetic installation is the Austrian studio mischer’traxler’s Curiosity Cloud, a series of hanging blown-glass bulbs, each of which contains a hand-fabricated insect that starts to fly around (thanks to a concealed circuit board and infrared sensor) when someone approaches it. The 23 species shown (both native and invasive) are North American, and they reveal, the designers say, “how fragile, dependent, and important” the coexistence among species is. These and other projects, and the prodigious amount of creative and scientific talent on display in the Triennial, offer hope for the future of all the earth’s living things.