If a tree falls in the forest and no person is around, does it still make a sound? Students view a short video segment to determine sound and decibel levels of various objects, including the loudest and quietest possible sounds humans...

The second episode in a playlist on the history of film focuses on the role the Kinetograph and the Kinetoscope played in film history. The video also includes information about the contributions of scientists, Vaudeville performers, and...