MEXICO CITY, Aug 5: Carlos Antonio Santamaria Diaz may be only 12 years old, but he has already enrolled in the National Autonomous University of Mexico (UNAM) and will begin his biomedical physics studies on Monday.The child prodigy earned his place in Mexico's most prestigious university after getting 105 points out of 109 in his admission test, becoming the youngest person to study a professional degree in the institution.