When was the year of Charles Darwin experiment?

Charles Darwin is best known for his voyage on the HMS Beagle, which began in 1831 and lasted until 1836. During this time, he conducted observations and collected specimens that would later inform his theories on evolution and natural selection. His groundbreaking work, "On the Origin of Species," was published in 1859, which compiled his findings and experiments. Thus, while his experiments spanned several years, the most significant observations occurred during the Beagle expedition in the early to mid-1830s.