In this excerpt from her new book Tree Notes: A Year in the Company of Trees, National Geographic Explorer Nalini M. Nadkarni reveals how tiny “windows” in the bark of trees help them respire.

The tree has smooth bark that is grayish brown and becomes scaly with age. The leaves are typically a dark green color, with a round shape and wavy texture. During warmer seasons, the trees have ...

Once the texture is right, they compress the piece ... joining them with “thick and prominent” welding to mimic tree bark or sap. Hand engraving the tree rings is the hardest part, says ...

Thomas Hardy wrote that people could identify a tree by its susurration - the ... perhaps, by the texture of their bark or the appearance of their winter silhouettes. In The Susurrations of ...

The bark of the tree is interesting, with a rugged texture and a grayish-brown color. In the fall, the tree produces small acorns that are characteristic of the oak tree. The oak bonsai tree ...