WITH AN INTRODUCTION BY DARWIN'S GREAT-GREAT-GRANDDAUGHTER RUTH PADELWhen the eminent naturalist Charles Darwin returned from South America on board the HMS Beagle in 1836 he brought with him the notes & evidence which would form the basis of his landmark theory of evolution of species by a process of natural selection This theory published as The Origin of Species in 1859 is the basis of modern biology & the concept of biodiversity It also sparked a fierce scientific religious & philosophical debate which still continues today