More than 20 states have had an unusually cool start to April. Find out if your state is included and where it will soon turn much warmer.

Scientist finds Jeffrey pine trees at record mountain heights, suggesting climate-driven shifts in Sierra Nevada.

A professor's casual hike in the High Sierra turned into a new elevation record for California's highest tree, the Jeffrey pine, which wasn't formerly known to grow at extreme elevations.

According to Alabama State Parks, it's the highest mountain in the state of Alabama.