NATALIE ANGIER, THE CANON — The second law [of thermodynamics] guarantees a certain degree of chaos and mishap in your life no matter how compulsively you plan your schedule and triple-check every report. To err is not just human; it's divined.
| A. | The study of clouds and their formation | NEPHOLOGY |
| B. | Armor-plated, club-tailed herbivore of the Cretaceous Period | ANKYLOSAUR |
| C. | Director of the 1966 sci-fi film "Fahrenheit 451" | TRUFFAUT |
| D. | Electromagnetic output of the brain (2 wds.) | ALPHAWAVES |
| E. | Early form of capacitor made of glass and tinfoil (2 wds.) | LEYDENJAR |
| F. | Fish-related | ICHTHYIC |
| G. | Degradation of matter and energy | ENTROPY |
| H. | What researchers search for | ANSWERS |
| I. | Night blindness | NYCTALOPIA |
| J. | Like good AC wiring (or a bad teen?) | GROUNDED |
| K. | Falling short of the ideal state | IMPERFECT |
| L. | Leveled off; became more uniform (2 wds.) | EVENEDOUT |
| M. | Like reasoning from complex to simple | REDUCTIVE |
| N. | Gravity-caused fluctuations | TIDES |
| O. | Predator whose eyes may be three feet apart | HAMMERHEAD |
| P. | Sea urchins, sand dollars and their ilk | ECHINODERMS |
| Q. | Parts of the visible spectrum | COLORS |
| R. | A place in the heart | ATRIUM |
| S. | A little something that comes free of charge | NEUTRON |
| T. | One way to get through a wall | OSMOSIS |
| U. | From the last phase of the Stone Age | NEOLITHIC |