Is that tree a pine, a fir or a spruce? Here's a handy guide to identifying the many species of trees populating Central ...

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 ...

From the Northern European Steppes, the Norway spruce amazes people with its impressive longevity and size. The tree can rise to over 150 feet and has long drooping branches that give its distinctive ...