"This is an image I took last Saturday showing Saturn and two of its moons—Titan and Rhea—setting behind the tree line of a mountain called Cerro de la Mitras located in Monterrey, Mexico ...

The tree line, also known as the timberline ... "The trees are a valuable 'time capsule' that tells us not only about these mountain forests 6,000 years ago, but about the climate conditions ...

NIIGATA--The tree line near the halfway point of 3,776-meter Mount Fuji, considered the uppermost limit where such plants can thrive, has steadily climbed over the past four decades and global ...