Black History: Lost, Stolen or Strayed Alfred Clothears explains to the

Alfred Clothears explains to the audience his discovery of how bears know when to go to sleep for the winter

and the role of equilibrium in the chemical industry

based on the distinction between a "red light person" and a "green light person

This film describes the rebuilding of post-Civil War South

demonstrating clearly why there are families of elements and gradual changes in the properties of elements arranged by atomic number across the table

Black History: Lost, Stolen or Strayed Alfred Clothears explains to theDid you know that the first open heart surgery was performed by a black doctor, Daniel Hale Williams? Not many people did in 1968, the year this eye opening film, narrated by Bill Cosby, was first released. Many still don't today. "Black History: Lost, Stolen or Strayed" reviews the numerous contributions of African Americans to the development of the United States. From the perspective of the turbulent late 1960s, the fact that their positive roles