Estados Unidos
Descrição:
This channel is dedicated to educational purposes for teaching, scholarship and research, particularly science and history.
All videos on this channel are organized to facilitate easy searches and research.
Every effort is made to provide the best quality videos available, usually restored & presented in 720p or higher HD resolution.
Insightful and constructive comments encouraged. Panty-wad & pointless comments will be deleted. Trolls will be banned.
Happy viewing!
