They each touched off a revolution that changed the world. Some key moments in the lives of Darwin and Lincoln:

Charles Darwin

Feb. 12, 1809: Born in Shrewsbury, England
1831: Graduated from Cambridge and began a five-year scientific expedition on the HMS Beagle
1839: Married Emma Wedgwood
1859: 'The Origin of Species' was published
1860: Defended his theory at the Oxford evolutionary debate
1882: Died in Downe, England. Buried in Westminster Abbey.

Abraham Lincoln

Feb. 12, 1809: Born in Hardin County, Ky.
1842: Married Mary Todd
1858: Debated Stephen A. Douglas seven times in failed Senate campaign
1860: Elected 16th U.S. president
1863: Issued Emancipation Proclamation and delivered Gettysburg Address
1865: Assassinated by John Wilkes Booth. Buried in Springfield, Ill.