Before Google, we actually had to physically look things up in this building full of knowledge.
If you are a sore loser, you are often called the sour variety of this fruit.See answer
It's a symbol and a fruit,
For man's folly, evil's root.
But also for great inspiration,
and famous application.
Select a pack of riddles and try to solve it in an interesting way.
This riddle appears in the following downloadable PDF files: