< späť na článok Fotogaléria: Kvíz len pre múdre hlavičky: Vyskúšajte sa v matematickom teste 1 /1 Newton's Equations. Rear view, close-up on young man standing back against green chalkboard. He explains, solves physics tasks, retro style. Processing for retro bleached look, slight vignette added. Zdroj: Istockphoto