Final answer:
Charles Darwin published the scientific papers on natural selection in 1858 and his monumental book, On the Origin of Species, in 1859.
Step-by-step explanation:
Charles Darwin published two significant works that contributed to the field of biology and laid the foundation for the theory of evolution. In 1858, Darwin and Alfred Wallace presented scientific papers on natural selection before the Linnean Society in London. The following year, in 1859, Darwin published his groundbreaking book, On the Origin of Species by Means of Natural Selection, which thoroughly detailed his arguments for evolution by natural selection. This book has since become synonymous with Darwin's name. In addition, Darwin's earlier observations and evidence were compiled into the published work called Journal of Researches (also known as The Voyage of the Beagle), providing an account of his travels and studies during the voyage of the HMS Beagle.