This is the time of year when Nicole Hughes gets constantly distracted by the fall foliage as she drives around North Carolina. "I'm always looking," says Hughes, a biologist at High Point University.

PENNSYLVANIA, USA — Ever wonder what happens to oxygen levels when leaves fall off the trees? Joe lets us know how we are still able to breathe. Find out the answer in this edition of Wham Cam.

Of all the trees that put on an autumn show, the golden splendor of the ginkgo tree is a scene stealer. This ancient tree species has no living relatives and has remained unchanged for 200 million ...

As the outside world normally is around this time each November, things have changed a lot. Many trees are already devoid of leaves while others are still covered with colorful ones. When the ...