In order to better understand just how extreme the state's weather has gotten, scientists looked to the ring patterns of 500-year-old oaks.
A study shows that most of the variation in plants and trees comes down to just two factors: overall size and the "leaf economics spectrum."
A linguist and top pomologists attempt to answer what should be a simple inquiry. Oddly enough, the answer brings a complicated tale of devil strawberries, insurance companies, inferior fruit, and the messy line between literal and metaphorical interpretation.
PBS looks at the radical environmentalists whose turn to terrorism discredited their quixotic campaign in "If a Tree Falls."
Hands-off care of the forests around Mount Rushmore may have created a sweet spot for an ancient enemy of the Ponderosa pine — the mountain pine beetle.
Reforesting efforts in Haiti may not provide immediate relief, but could create a renewable and sustainable supply of food and fuel for desperate villages.