Beginnings

The Byzantine and Christian Museum exhibition "Byzantium and the Others in the First Millennium: An Empire of Stability in a Turbulent Era," examines the influential role of Byzantium in Europe and the Mediterranean region from 300 to 1000 AD, a turbulent period of upheavals, in six thematic sections and with objects on loan from significant museums and cultural institutions in Greece and abroa

In the sprawling greenery of the Brazilian Amazon, near the border with Peru, a group of people -- small in the distance -- walk through a clearing.

These are isolated tribe members, and little do they know, they're being watched -- drone footage revealing their existence to the world.