Questions with the keyword 'invention'

• who invented the pinhole camera and why do we need to use it?! by ninja turtle 2 to Ed, Guido, Hugh, Stef Comments: (No comments so far )
• what one invention do you wish you had invented? by Rose to Dave, Ed, Guido, Hugh, Stef Comments: (No comments so far )
• If you could invent one thing with no time/economical restrictions what would you invent? by AnyaN and 1 other. to Dave, Ed, Guido, Hugh, Stef Comments: (No comments so far )