At 22, Charles Darwin set sail for a 5-year trip around the world. His notes from the Galapagos and other destinations were central to the development of his theory of evolution through natural selection, which he described in his 1859 book, On the Origin of Species. The lost collection of books that kept Darwin company aboard the HMS Beagle and provided inspiration for his work on evolution have been made available online for free!
To check out these texts and collection of amazing images, head over to Darwin Online Beagle Library Project!