Answer:
The more you add the less it weighs. What is it?
I can run but not walk. Wherever I go thought follows close behind.
With three eyes and as black as night I frequently knock down ten men with a single strike!
I am in the past never in the future. I don't exist but have existed. I saw what you saw and that is what I will ever see.
I am gold and can be black and white I'm a symbol for a nation when freedom took flight.
A little house full of meat, no door to go in and eat.