Florida On Nature (Περὶ Φύσεως, Peri Physeos) is the name of several works of ancient philosophy, especially by the Pre-Socratics: On Nature (Anaximander) On Nature (Heraclitus) On Nature (Parmenides) On Nature (Melissus) On Nature (Empedocles) On Nature (Philolaus) On Nature (Epicurus) Topics referred to by the same term