Answer:
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
I have a name that's not mine and no one cares about me in their prime. People cry at my sight and lie by me all day and night.
Angels and pilots work with me.
I am a delicious way of representing data.
I have an eye but am blind, a sea, but no water; a bee, but no honey; tea but no coffee; and a why, but no answer. What am I?
What is lighter than what it is made of?