Biography of the Nobel Prize-winning Polish scientist whose work with radium helped to change the world.

Describes the life and scientific career of Charles Darwin, especially his theory of evolution which was published in his famous book in 1859: The origin of species by means of natural selection, or, the preservation of favoured races in the struggle for life.

Presents the life of Barack Obama, including his childhood in the United States and abroad, careers as a community organizer and lawyer, and his election as the forty-four president in 2009.

Describes the life and accomplishments of Clara Barton, a teacher who organized efforts to bring nursing care to wounded soldiers during the Civil War and who went on to become the founder of the American Red Cross.