Have you ever asked yourself 'Why is it raining? Why is it dark? Or even your nails come from? Let 'Knowledge around us' with you answer those questions. The application is a thorough investment in the selection of information to answer people's questions from the smallest things. Along with providing useful information, we also have a test of your knowledge and the score will be stored and shared with other users, with the sole purpose of stimulating passion ... Hopefully, 'Knowledge around us' will be the place to give you the most useful leisure time!