Where can I watch The Nature of Things in United States?

The Nature of Things is a Canadian television series of documentary programs. It debuted on CBC Television on November 6, 1960. Many of the programs document nature and the effect that humans have on it. The program was one of the first to explore environmental issues, such as clear-cut logging. The series is named after an epic poem by Roman philosopher Lucretius: "Dē Rērum Nātūrā" — On the Nature of Things.