 Complete the following phrase:  The Natural History  is a work by Pliny the Elder. It is one of the largest single works to have survived from the Roman Empire to the modern day and purports to cover all ancient knowledge. The works subject area is thus not limited to what is today understood by natural history; Pliny himself defines his scope as the natural world, or life. It is encyclopedic in scope, but its structure is not like that of a modern encyclopedia. It is the only work by Pliny to have survived, and the last that he published. He published the first 10 books in AD 77, but had not made a final revision of the remainder at the time of his death during the 