It's not accurate to say evolution was "discovered" in a single moment. It's more accurate to say the concept of evolution developed over time, with many individuals contributing to the understanding of how life changes.

Here are some key milestones:

* Ancient Greek Philosophers: Philosophers like Anaximander and Empedocles proposed ideas about life changing over time, but these were largely based on speculation.

* 18th Century: Naturalists like Carl Linnaeus developed systems for classifying organisms, recognizing similarities and differences.

* Early 19th Century: Jean-Baptiste Lamarck proposed a theory of evolution based on the inheritance of acquired traits, which was ultimately disproven.

* Mid-19th Century: Charles Darwin and Alfred Russel Wallace independently proposed the theory of evolution by natural selection, which is the prevailing scientific explanation for the diversity of life on Earth.

Therefore, there isn't one specific date for the discovery of evolution. It's a process of scientific understanding that has evolved itself.

While Darwin and Wallace are credited with the theory of natural selection, the idea of evolution has been around for centuries.