Top+10+'inventions'+that+changed+our+world!

=Inventions and Inventors!=

An invention is an innovative idea (i.e. an original idea of its inventor) which has become a reality! It just takes 'a necessity', a problem that needs a solution to make life easier or more comfortable, a curious person with a 'divergent' turn of mind, the needed resources (i.e. materials), and the background knowledge because, whether we like it or not, every 'new' invention is based on knowledge acquired in previous experiments!

For a more 'structured', 'down-to-earth' definition try the following link: Top 10 'inventions' that changed our world!