The Biosphere, Environment Museum

This guide to the Biosphere in Montreal traces how ironworkers built Buckminster Fuller's geodesic dome for Expo 67, wrapping steel tubing in a glowing acrylic skin that more than five million visitors walked beneath. It follows the accidental 1976 fire that swept through the sphere during routine welding work, and the nearly fifteen years the bare steel skeleton sat empty afterward. Listen for what finally convinced Environment Canada to fill that empty frame again.