Answer:
Describes universities like Harvard and can be poisonous.
Whoever makes it, tells it not. Whoever takes it, knows it not. And whoever knows it wants it not
I can be quick and then I'm deadly, I am a rock, shell and bone medley. If I was made into a man, I'd make people dream, I gather in my millions By ocean, sea and stream.
When they are caught, they are thrown away. When they escape, you itch all day.
What do people want the least on their hands?
My days are numbered. What am I?