The search for four lions which escaped from the Kruger National Park this week continues into the Easter weekend.

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.

UC Davis Professor Hugh Safford was hiking for pleasure in California's High Sierra when he stumbled upon a new elevation ...

There are many other old-growth forests across the continent. Each of these forests has a unique ecology, but all are under ...