Yesterday I woke up at 4 am with the words xylem and phloem bouncing around in my mind. The bio class I barely learned these terms in was 26 years ago, and while xylem shows up now and then in crosswords, I don't know that I've ever had cause to read, write, say, or hear phloem in over a quarter century.
This is the third time in 2008 my sleeping brain has brought facts to the surface that my conscious mind probably couldn't conjure if it tried. I kind of want to set my alarm clock for a different time every night, and see what else I can learn from myself. I'm also kind of scared. What else do I know that I've forgotten during the daylight hours?