Extensions of our bodies, from the moment we wake up to the moment we go to bed, we consult them over 2,600 times a day. Mobile phones are an integral part of our lives. But have you ever wonder how they work, what are their components are and where those come from? Karim Ben Khelifa, war correspondent and photojournalist, answers these questions in his augmented reality journalistic investigation, Seven Grams. Seven Grams beacause it is the amount of minerals that our smartphones contain for their proper functioning.