This week we look at Birutė Galdikas, a primatologist who went into the rainforests of Borneo in 1971 to study one of the world’s least understood great apes: the orangutan. One of Louis Leakey’s famed “Trimates,” alongside Jane Goodall and Dian Fossey, Galdikas spent more than five decades documenting orangutan lives and fighting to protect their habitat against loggers and the exotic pet trade.