Picture yourself in a wind-swept forest. Leaves are rustling and trunks are creaking as trees sway to and fro. This oscillation might seem precarious, but it’s actually an ancient adaptation: If pines and firs and all the others were perfectly stiff, a gust would snap them. So instead, they flex.
Now teleport yourself to the top floor of a skyscraper during the same windstorm, ever so slightly bending in the same way. A tree’s clever evolutionary trick, you see, has made the modern metropolis possible: As towers reached higher and higher in the early 20th century, architects used not wood but steel to create giants that would similarly flex in hurricane-force winds and as earthquakes rattled their foundations.
But as the world gets hotter and wildfires more intense, architects are turning back to trees for more than inspiration. Engineered materials like cross-laminated and glue-laminated timber, in which layers of wood are glued together, create beams that are tough and somewhat flexible, yet lightweight. They’re so strong, in fact, that designers are craft... Read more
