This week, we lead an ascent of el Capitan in Yosemite with a 13-year old, a blind climber and a paraplegic climber;  we fight to stop the stealing of 38 million animals each year from Brazil's forests; we learn the secrets of Stonehenge and ponder how the 35-ton stones were arranged; we fight to protect the last remaining populations of the world's 3,000 wild tigers; and we bottle feed a baby cheetah.