Millie Bobby Brown dresses her Christmas tree with this century-old holiday accessory – it brings instant texture against the white lights and branches. Story by Megan Slack • 4mo.

Here, we review the shape, structure, and texture of each tree's leaves so you can recognize and name them. 1. of 6. Willow . ... with the branches spreading out along the top.

Grey Tree by Piet Mondrian, 1911. [Image: Kunstmuseum Den Haag] Fundamental research in the biology of branching helps cure cardiovascular diseases and cancer, design materials that can heal ...