Find Clues Below
- Click for Clue #1: This is alive.
- Click for Clue #2: It grows on rocks.
- Click for Clue #3: It grows very slowly.
Enter your answer then click the button to solve the mystery.
This is lichen. Many of the rocks along Lake Superior's shores are covered in various kinds of lichen. This lichen happens to be growing on cement near a lighthouse. Lichen is actually two different organisms living in symbiosis: a fungus and algae or cyanobacteria.