Screen Time looks at documentaries

While documentaries were huge following the success of "An Inconvenient Truth," the excitement has dimmed a great deal since then. But due to the availability of affordable high-quality equipment, amazing documentaries continue to appear in local movie theaters almost weekly.

Consider the current "Teenage," an examination of how the concept of teenagers was an invention of circumstance in the first half of the 20th century. As with many such documentaries, you have to be fast if you want to see it in the theater; its run ends on Thursday.

We discuss why docs have such a short theater life, recommend a selection of great films and take audience suggestions for documentaries everyone should see.

• 'Teenage'

• 'The Unknown Known'

• 'Client 9'

http://youtu.be/WldZazpFy7I