*Forever Letter Stamps: Life Magnified*

With 20 otherworldly images, this issuance explores life on Earth, as few have ever seen it. The pane features images taken using microscopes and highly specialized photographic techniques to capture details of life undetectable by the human eye. The stamps include vivid images of red blood cells, the feather of a macaw parrot, a knotted strand of human hair, moss leaves, diatom shells (photosynthesizing algae), freshwater protozoans, an acorn barnacle, a moth's antenna, the front foot of a diving beetle, neurons from a mouse's brain, bone tissue from a starling, scales on the wing of a Madagascan sunset moth, a juvenile zebrafish, mushroom gills, the tongue of a freshwater snail, a blue button (an organism similar to a jellyfish), mold spores, the legs (known as cirri) of a barnacle, flame lily pollen, and the surface of a southern live oak leaf. For hundreds of years, scientists have held deep fascination with making the invisible elements of our world visible. The images that result