Lucretius

Titus Lucretius Carus (ca. 99 BC – ca. 55 BC) was a Roman poet and philosopher. His only known work is an epic philosophical poem laying out the beliefs of Epicureanism, De rerum natura, translated into English as On the Nature of Things or “On the Nature of the Universe”.

– from the Wikipedia article http://en.wikipedia.org/wiki/Lucretius