Philip guides you like an eager kid at his own personal science fair, pausing to scratch into the earth where Iron Age settlers once built a forge. He says that about one in seven of his experiments pans out, noting there is no such thing as a free education.
Some people center their lives around money or status or community or service to God, but this seems to be a learning-centered life, where little bits of practical knowledge are the daily currency, where the main vocation is to be preoccupied with some exciting little project or maybe a dozen.
Some people specialize, and certainly the modern economy encourages that. But there are still people, even if only out in the African wilderness, with a wandering curiosity, alighting on every interesting part of their environment.
The late Richard Holbrooke used to give the essential piece of advice for a question-driven life: Know something about something. Don’t just present your wonderful self to the world. Constantly amass knowledge and offer it around.