One of North America’s richest ecosystems, sustained and shaped by Native peoples before European contact, nearly disappeared. A recovery is underway.

Pine rings record a sharp rise in rainfall intensity and volatility, showing modern extremes exceed patterns seen over the past 500 years.

One of the simplest examples of how plants adapt to ensure that their species survives is found in pine cones. Evergreen trees that produce cones are called conifers. There are more than 600 species ...

If you bought a live pine tree for Christmas, you may be thinking about planting it in your yard. Here in Tucson we are in Sunset Zone 12. Most pine trees that do well in our desert are imports from ...