Michael Crow

A 21-foot tall model of the Transformers character Optimus Prime is displayed on the red carpet before the world premiere of the film "Transformers: Age of Extinction" in Hong Kong.

Some sci-fi writers want fewer killer robots and more vision for the future

Does sci-fi always have to depict a dark, gloomy future for humanity? Two prominent sci-fi writers are prodding their colleagues to paint a more positive vision of the future in their works.Does sci-fi always have to depict a dark, gloomy future for humanity? Two prominent sci-fi writers are prodding their colleagues to paint a more positive vision of the future in their works.