Please tell me why....???

Well i dont know what is the black box is made of, however i think it would be to expensive or too rare to get to make some many plane.

It would make sense for planes and for cars. I bet it would be too heavy or something. Too costly or something. Not sure it would be pleasant to ride in a large black rectangle. Thanks for bringing this to where we can go hmmmm and think just a bit differently.

Hi, well it's not just what it's made out of but the thickness and shape of it. A plane, since it must fly, is a compromise between weight and strength. In fact, almost without exception, all made made products involve a compromise between qualities

all the best urban

Can you get cavities in your dentures if you use too much artificial sweetener?