when did charles darwin find out about evolution?

It was an ongoing process. Apparently, he began thinking about evolution as early as 1831 at the beginning of the voyage to the Galapagos Islands. He published Origin of the Species in 1859.

http://www.blupete.com/Literature/Biographies/Science/Darwin.htm

When he went on the "HMS Beagle" expedition to the Galapagos Islands of Ecuador, and just afterwards. The time was 1831-1837

You might find

Darwin's "Origin of Species": A Biography (Books That Shook the World) by Janet Browne

useful. It is a short book and easy to read. It has a time line and also includes information about others who were thinking along the same lines at the time.

Charles Darwin began developing his theory of evolution during his voyage on the HMS Beagle from 1831 to 1836. However, it wasn't until much later, in 1859, that he published his groundbreaking book, "On the Origin of Species," which presented his comprehensive theory of evolution.

To find out when Charles Darwin discovered evolution, you can follow these steps:

1. Start by researching Charles Darwin's life and work, particularly his voyage on the HMS Beagle and his subsequent publications.
2. Look for credible biographies, academic papers, or reliable online resources that discuss Darwin's contributions to the theory of evolution.
3. Pay attention to the timeline of events, noting when he embarked on the HMS Beagle voyage and when he published "On the Origin of Species."
4. Read about Darwin's observations during his voyage, especially in places such as the Galapagos Islands, where he studied different species and their variations.
5. Examine the evidence Darwin collected and consider the years of research, reflection, and collaboration with other scientists that went into formulating his theory of evolution.
6. Summarize these findings to determine when Darwin started formulating his theory and when he published his revolutionary book.

Remember, it's essential to consult reputable sources and multiple references to get an accurate understanding of when Charles Darwin discovered and unveiled his theory of evolution.