Ecologists discovered the tallest tree in the Amazon – and it was nearly 50 percent taller than the previous record holder.

For decades, researchers anticipated that climate change would stunt the Amazon’s tallest trees. But a gargantuan new study ...

These skyscraping superstars are the stalwart examples of their species Trees have many interesting features and uses, but it's perhaps their height that inspires the most reverie. Humans may have a ...

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.

In 2006, two naturalists pinpointed the location of the world's tallest living tree in Redwood National Park. If you had a once in a lifetime opportunity to visit this iconic tree, would you? If you ...

Oregon Field Guide is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, ...