Copy right

So i learned somethings about copyrights the other week. 1st i learned that for a person it lasts your whole lifetime plus 70 years! a company it is forever!!! one cool thing i learned is that you don't need the copyright c. anything in a lasting from (books, cd, typed on a computer) is copyrighted which is really pretty cool. the tricky part with that is if you get it copyrighted (which can cost money),then you can say i worte (or whatever) this 5 years ago, before this thing came out. and you have proof.