These things were proposed to contain outward-flowing layers called simulacra by a Roman thinker who described their downward motion being interrupted by random deflection. Lucretius’ De rerum natura claims free will is caused by the “swerve” of these things. The so-called “laughing philosopher” is best known for his theory of these (10[1])things, (10[1])which Leucippus contrasted with the void existing between them. (10[1])Democritus (-5[1])theorized that the universe is made of these (10[1])things, which are named for the word for “uncuttable.” For 10 points, Greek philosophy conceptualized what smallest units of matter that today name structures containing protons and neutrons? ■END■ (10[1])