Anaxagoras portrait, flat vector illustration

 anaxagoras, ancient philosopher, greek philosophy, pre socratic, nous concept, mind principle, cosmology, natural philosophy, universe theory, matter composition, cosmic order, philosophical thought, atomism precursor, early science, celestial bodies, moon theory, sun theory, stars explanation, nature study, philosophical ideas, intellectual tradition, classical antiquity, reason and mind, philosophical inquiry, physical reality, early physics, theoretical philosophy, cosmological principles, elemental theory, universe structure, logic and reason, natural explanation, science beginnings, ancient teachings, observation and reasoning, rational thought, scientific philosophy, early astronomy, philosophical doctrine, greek thinker, cosmic intelligence