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 (10[1])rerum natura claims free will is caused by the “swerve” of these things. (10[1])The so-called “laughing philosopher” is best known for his theory of these things, which Leucippus contrasted with the void existing (10[1])between them. Democritus (10[1])theorized (10[1])that the universe (10[1])is (10[1])made of these things, (10[3])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■