"Scientists have solved problems as varied as the germ theory of disease and the start of our universe. This amazing book outlines the great discoveries made and the principles followed by scientists who explore our world. Readers will enjoy reading the stories behind each historic discovery as well as the mini bios of the science "STEM-gineers" who made them. Experiments and research challenges help reinforce concepts."-- Provided by publisher.

Includes index.

Seeking scientific knowledge -- The theory of light -- A universal force -- The origin of species -- Germ theory of disease -- Explaining radiation -- Inheritance and genetics -- Light, space and time -- An expanding universe -- The start of the universe -- The reshaping of Earth -- The genetic code for life -- The origin of cells.