Some trees fell down in the big windstorm recently.
An old saying is: "If a tree falls in the forest and no one hears it, does it make a noise?"
This means: If no one knows something, does it exist?
This blog is mainly to explain a different English language expression every day. Sometimes I post other stuff. I also have a YouTube channel which is mostly about computer software: https://www.youtube.com/englishspacedog