Bomen worden soms honderden jaren oud. Dus waarom gaan ze dood? Verrassend antwoord: dat weet niemand.
“Every few minutes they measure the diameter of that tree,” he explains. The trees look like patients in intensive care — wired up with tubes coming out of the stems. All to see what it takes to kill it. “Everyone knows it gets hot and dry; you know, beetles show up, the trees are dead,” McDowell says, “but we don’t really understand it.”