Add Yahoo as a preferred source to see more of our stories on Google. (NewsNation) — As we move further into the fall season, you may notice that the leaves on the trees are starting to change color.

It’s now peak colors at the Arboretum in Chaska. Laura Irish-Hanson with the Minnesota Landscape Arboretum gives us the science behind the leaves changing colors.

After weeks of delay due to warmer weather, we're finally seeing some trees turn to beautiful red, orange and yellow colors. Dr. Christy Rollinson, senior scientist at the Morton Arboretum joined ABC7 ...