Dark Sky Champions talk about the importance of
Dark Skies to the Bruce Peninsula Biosphere
Dark Skies for Wildlife
http://www.youtube.com/watch?v=EYr8YaC9Ue8

Dark Skies for Astronomy
http://www.youtube.com/watch?v=ImWyVq-tRX0

Dark Skies for Tourists
http://www.youtube.com/watch?v=qztu5p1R_is

Dark Skies for Residents
http://www.youtube.com/watch?v=SpuGZqPa7cs

Measuring Dark Sky Quality
http://www.youtube.com/watch?v=rdmjiXwU23k