Abstract In the ancient world the dividing line between the Arts and the Sciences was not so rigidly drawn as in recenl times. Poets and prose authors alike frequently crossed the boundaries in their literary works. Notable Greek interdisciplinary writers include Hesiod, Aristotle and Theophrastus and, among the Romans, Lucretius, Virgil and Pliny the Elder are the best known. Thus Aristotle wrote the Poetics on the nature of drama and related topics and, in addition to many other philosophical and scientific works, the Meteorologica, a mixture of sciences. Virgil composed the Aeneid, a national epic glorifying Rome and the emperor Augustus, and the Georgics, a handbook of agriculture. Pliny the Elder, the nineteenth centenary of whose death was celebrated on 24 August 1979, had wide-ranging interests. His works include a treatise on the javelin, a history of Rome's wars against the Germans and the unique encyclopaedic Natural History. The present review examines Pliny's career and assesses his contributi...