Hyperion, certified by Guinness World Records as the world's tallest living tree, is officially off-limits to visitors. California's Redwood National Park issued a statement last week that anyone who ...

In coastal Oregon, the state's tallest fir tree is burning. Douglas-firs (Pseudotsuga menziesii) are Oregon's most common trees, but the tree that's ablaze, known as the Doerner Fir, is special.

When Brian French learned last week that the Doerner Fir was burning, he could think of only two reasons why: Either lightning had struck the enormous conifer in coastal Oregon — or someone had set it ...