Algae, lichens and moss often form green or grey, powdery or mossy, crusty growths on the stems, branches and trunks of trees and shrubs. Pictured here, lichen and moss. This dreary "gray all day ...

Unlike species like bioluminescent algae, moss doesn’t literally glow, but this “lighting up” effect isn’t just Trish’s imagination: Rain really can make moss (and lichen) change color ...

Bouvet Island, for example, lies 4,430 km from Heard Island, but they share 30 percent of their moss species, 29 percent of their liverworts, and 32 percent of their lichens.

Sports; Outdoors; As rock climbing grows in popularity, biologist examines how climbers impact lichen, mosses in Dishman Hills Nov. 14, 2021 Updated Sun., Nov. 14, 2021 at 1:32 p.m.