Shortly before 2000, California oaks began dying. The University of California launched an investigation. What was causing this plague, and how might California oaks be kept healthy? A water-borne ...

The Shumway Oak Grove Regional Park in Stockton launched an autumn nature walk for the community to get an inside look at how important California's historic oak trees are, especially during the fall.

An Inland Empire city has approved a development project 450 feet away from the third oldest known living organism in the world — a sprawling, shrub-like oak tree that is more than 13,000 years old.

It’s less than a half-inch long but it can fell a giant oak tree in no time. The goldspotted oak borer, GSOB or Agrilus auroguttatus, is a 0.4-inch bullet-shaped beetle with six golden spots on its ...

Tree limbs and tops began falling off century-old black oak trees on the La Jolla reservation in northern San Diego County around 2014 and nobody knew why. The die off was puzzling and tribal fire ...

If you’ve noticed unusual bumps that look like tiny “horns” or brown spots on the leaves of your oak tree this winter, you’re ...

Ron Durbin, who trekked with a group into a rugged Santa Clarita canyon, quickly spotted nearby trees pockmarked with D-shaped “exit holes,” a deadly calling card. This was the work of the goldspotted ...

Add Yahoo as a preferred source to see more of our stories on Google. An Inland Empire city has approved a development project within 450 feet of the third oldest known living organism in the world — ...