What am I?

I can be dropped from the tallest of buildings and survive, but drop me from the smallest ship and I won't. What am I?

I am worthless, yet when added to others I add worth. I confounded the ancient Greeks, yet I changed men’s understanding. What am I?

I am soft but hard. What am I?

I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?

Riddles and Answers