National Public Radio: In the news business, an evergreen is a story that doesn't have to run on a particular day, but can stay fresh for a long time.
This is an evergreen story about an evergreen. In particular, a group of plants called bryophytes. Turns out they may be evergreen quite a bit longer than most people thought.
The most famous bryophyte of them all is moss. "After a hundred years, a moss may look perfectly natural and even retain its green color," says Jonathan Shaw, a scientist at the bryology lab...