What is this green stuff growing on trees? 🤔

追加: 2026-06-04

[00:00:00]What is this green fiber looking thing?

[00:00:03]At first, I thought it was some kind of plant fiber.

[00:00:07]But then, I noticed it growing all over the tree bark.

[00:00:12]Scientists say this isn't actually a plant. It's called lichen. Lichens are made from a partnership between a fungus and algae living together. They can survive extreme cold, drought, and long dry periods. Tiny insects and even birds sometimes use lichens for shelter or nests. Lichens also help forest ecosystems over time by slowly breaking down surfaces and helping create soil.

[00:00:42]And because they're very sensitive to pollution, they're often considered a sign of clean air. Sometimes forests feel alive in ways we don't even notice.