What are some scientific breakthroughs of the Age of Realism and what new ideas undermined Enlightenment ideas

Answer 1

Darwin was definitely something during the age of realism. Louis Pasteur for pasteurization.

The Enlightenment sought to use reason for freedom and happiness. Those goals were slightly lost as the realist perceived the world as how it really was.

Answer 2

The discovery of electricity by Benjamin Franklin was during this period. The French Revolution is a really good example of the Enlightenment idea being taken too far, and having horrific results. All of this information is easily found in books and on the internet.