Dr. Universe | Evergreen trees
Last updated 12/24/2019 at 1:53pm
Why are evergreen trees green all year? – Emily, 10, Silverdale, Wash.
Whenever I go for a hike in the woods, I can’t help but admire the tall evergreen trees. No matter what time of year it is, the pines, hemlocks, cedars, and spruces are usually all green.
My friend Bert Cregg is also very curious about the lives of trees. He graduated from Washington State University and is a professor at Michigan State University.
Cregg told me that evergreens have lots of needles, which are their leaves. We have even seen some trees, such as bristlecone pines, that have had the same nee...