it is science, it is real. many people even travel or go back home to be with their families, and they tend to forget about their school work that is due shortly after the break is over. back and next buttons can guide you through all the sections or you can choose to jump from section to section using the links below or the links at the left. ‘i can’t tell you how i know, but i’m certain. billions of people use the web on a daily basis – but do you know who invented the search engine? 