To discover and to watch

Gaia.com

A channel dedicated to spiritual matters in the broadest sense of the term, to the practice of meditation and yoga. Resolutely devoted to Anthropology and to the history of ancient civilizations and to unresolved enigmas.  To discover.

BBC Earth

The British channel dedicated, as its name suggests, to the planet.  

National Geographic

More specific, it is aimed at the discovery of animal species, fauna and flora in a broader range.