When Charles Darwin finished The Origin of Species, he thought that he had explained every clue, but one. Though his theory could explain many facts, Darwin knew that there was a significant event in the history of life that his theory did not explain. During this event, the "Cambrian explosion," many animals suddenly appeared in the fossil record without apparent ancestors in earlier layers of rock.
In Darwin's Doubt, Stephen C. Meyer tells

In September 1838, a young Englishman named Charles Darwin hit upon the idea that "natural selection" among competing individuals would lead to wondrous adaptations and species diversity. Twenty-one years passed between that epiphany and publication of On the Origin of Species. The human drama and scientific basis of that time constitute a fascinating, tangled tale that illuminates this cautious naturalist who sparked an intellectual revolution.

After a career in the academy, Canadian-born Grant Allen struck out on his own to make his name as a writer. His early focus was on scientific topics, though he later expanded into fiction, as well. Allen was an early proponent of Darwin's theory of evolution and helped to popularize the idea through his writing. His biography Charles Darwin is an engaging and comprehensive look at the scientist's life and work.

Available for the first time in three separate volumes, To the Edge of the World is a seafaring adventure in the tradition of Patrick O'Brian, chartering the lives of Captain Robert Fitz Roy and Charles Darwin, their friendship, and the historical voyage that ultimately drove them apart. In 1831, FitzRoy and Darwin - a Christian Tory and a liberal naturalist - board the HMS Beagle and set sail for Tierra del Fuego. As they travel around the world,