By the latter part of the 19th century, even many theologians ... Yet, Darwin's revolution -- perhaps the greatest in the history of science -- inspired a counter-revolution that continues today.

At the beginning of the 19th century, though there had been some advances in medical knowledge, scientists still did ... The next great breakthrough came in the 1860s when Louis Pasteur, using ...

At the beginning of the 19th century ... which enabled scientists to see germs and bacteria in more detail than had been possible before. The next great breakthrough came in the 1860s when ...