Story : In the third episode of Superquark another documentary from the spectacular new BBC series Human Planet: Jungles. Tropical forests cover only 2% of the planet, but half of living species live there. Surviving in this hostile environment requires a deep understanding of jungle ecology. For example, most edibles grow at more than 30 meters above sea level, so getting enough food is a strenuous daily struggle. Almost 3 million Italians have difficulty reading and writing. It is dyslexia, a disorder that is well known today, but which in the past meant that certain children at school were considered lazy, uninterested, or worse, unintelligent. Today we know that this is not the case, and on the other hand, so were Einstein and Kennedy. In the report by Marco Visalberghi.