This story appears in the December 2012 issue of National Geographic ... Its dead spire, blasted by lightning, rises to 247 feet. Its four great limbs, each as big as a sizable tree, elbow outward ...

This story appears in the April 2015 issue of National Geographic ... province may be dead. That’s a billion cubic meters of wood. The trees aren’t the only casualties. A forest die-off ...

The team used a random forest classification model, a powerful machine learning technique, to map the distribution of dead trees across Yellowstone. They combined data from the National Ecological ...