Let's face it. With school pressures, social pressures, parental pressures...the teenage years are tough. Your best friend is with you one day, dating your crush the next. But it could be worse! You could be face-to-face with an angry grizzly, or chest-deep in quicksand. Never fear, National Geographic has the solution! In this hilariously informative take on surviving the trials of middle school and the jungles of South America, we combine our expertise...