Kurtz’s Mill Covered Bridge gleams white against the blue Pennsylvania sky like a cloud come to earth. Inside, wooden beams create a tunnel effect that frames the view beyond in a perfect rectangle.

The height clearance sign tells you exactly how tall your vehicle can be to pass through safely. A small stream flows ...

By Anne Sherwood Pundyk Natural boundaries, such as the edge of a forest or the bank of a stream, can be at cross-purposes ...

In fantasy worlds, trees like the Lord of the Rings’ Ents are agile and mobile. In the real world, they’re slow.

From pollinating plants to dispersing seeds, birds play a variety of crucial roles that help to keep ecosystems in balance.

As they sat on their porch overlooking the creek, a squirrel affectionately named Speedy scurried onto Funk’s lap to beg for ...

The venture, privately funded to start, is now run by the University of Arizona. And today, scientists there are quietly ...