Answer:
What looks back but cannot see?
Whoever makes it, tells it not. Whoever takes it, knows it not. And whoever knows it wants it not
Describes universities like Harvard and can be poisonous.
A hole leading in, a hole leading out, we connect to a cavern that is slimy all throughout. What are we?
What is it that makes tears without sorrow and takes its journey to heaven?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?