A species of old-growth tree that is totally new to science has been hiding out in a narrow slice of mountain rainforest in ...

This story appears in the December 2012 issue of National Geographic magazine. On a gentle slope above a trail junction in Sequoia National Park, about 7,000 feet above sea level in the southern ...

Australia is threatened by dangerous trees. They have infested our cities, menaced our power lines, invaded our grasslands, ...