Add Yahoo as a preferred source to see more of our stories on Google. SEQUOIA NATIONAL PARK, California (AP) — High in the evergreen canopy of General Sherman, the world’s largest tree, researchers ...

High in the evergreen canopy of General Sherman, the world's largest tree, researchers searched for evidence of an emerging threat to giant sequoias: bark beetles. They descended the towering ...

Researchers climbed General Sherman, the world's largest tree, for the first time ever and gave it a clean bill of health. The researchers were looking for bark beetles, which have become more ...

SEQUOIA NATIONAL PARK, California (AP) — High in the evergreen canopy of General Sherman, the world’s largest tree, researchers searched for evidence of an emerging threat to giant sequoias: bark ...

SEQUOIA NATIONAL PARK, CaliforniaSEQUOIA NATIONAL PARK, California — High in the evergreen canopy of General Sherman, the world’s largest tree, researchers searched for evidence of an emerging threat ...