Description The great thinkers of the 19th century contributed greatly to the development of theories that help explain human nature and the natural world. Charles Darwin developed his theory of evolution. Gregor Mendel created the theory of genetics. Countless other scientists and innovators contributed to this era of science in many other ways. It was in this era when people learned about fossils, photography, combustion engines, and the use of electricity to power our world. This visually stunning book is sure to draw in even reluctant readers. The main text is supplemented with timelines on most spreads, as well as primary sources, sidebars, and diagrams