Throughout his life, Charles Darwin kept diaries and secret notebooks. These records have helped historians and filmmakers piece together the story of a remarkable, complex man. Darwin was driven to discover nature's laws. Yet he worried that his theory of evolution would shock many in Victorian society, even his own wife.

We have constructed our own version of "Darwin's Diary" -- a sampling of private musings and published thoughts -- to offer you an intimate look at one man's scientific insights and personal struggles.