![Leaf Luminescence](https://arning.com/wp-content/uploads/2023/05/IMG_0134-2-1.jpg)
Walking up California Street, I watched the sun crest Sandia’s peak. As I pasted Constitution, a particular tree caught my attention — sunbeams radiate some leaves, while others get cast into shadow. For my postcard marked 05/03/23, I chose an image of a sun-illuminated leaf, a sight that stirred memories of my youth, peering at leaves under a microscope.