We had an excellent (if sometimes grey) morning with Dr Rebecca Yahr, Lichenologist, from the Royal Botanic Garden Edinburgh on Sunday. As you’ll know, the Edinburgh Shoreline project is run by the Botanics, so we’re lucky enough to work with Becky, but Sunday was all about unleashing her on the general public, and what a day it was! As well as researching lichens, Becky also works on public engagement. The Botanics wants everyone to know what special organisms lichens are: a symbiosis of a fungi and an algae. The algae produces the food for the organism through photosynthesis, and the fungi produces a protective sunscreen layer for the organism. Lichens like to live on rocks and bark, amongst other places, and they also prefer clean air. So, Becky took us on a walk to Cramond Island to find lichens. As the island is in the middle of the Forth, at...