Today’s thought comes from the website of J Timothy Caldwell. I quote:

Exercise: ask a choral singer to sing a scale in a legato manner as you watch the area of the throat known as the “Adam’s Apple.” You will probably see tiny, jerky motions as the singer moves from pitch to pitch. The motions come from “jumping” from pitch to pitch. If you ask a well-trained solo singer to perform the same exercise, you will see little or no movement-this is because the singer is “sliding” from pitch to pitch.

(The whole discussion is here: http://www.jtimothycaldwell.net/blogs/?page_id=28)