A video lecture explaining that the Maxwell's "demon" does not contradict the second law of thermodynamics. Video begins by reviewing the second law of thermodynamics which states that the universe tends to move towards more entropy. Maxwell's "demon" is explained as a process that makes a hot body hotter, which appears to violate the second law. On second look though, the process would generate more entropy than the entropy lost due to making the body hotter. [13:27]