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.

A Michigan man has found his calling, seeking to reproduce some of the oldest and biggest trees ever known to humanity by cloning them, according to the online magazine Reasons to Be Cheerful. From ...