Across 1. Saddam, for one 6. Tricky curve 9. Flat-topped mountains 14. Air twice 15. Snip 16. Suggest 17. Entropy enlarger 20. Danger 21. Outdoors walk 22. Gumshoe 23. Teletypewriters (abbr.) 25. Bill Gates, e.g. 27. Awe 31. Fired (euphemism) 35. ~(A v B), as a gate 36. Postfix calculators (abbr.) 37. Man-machine hybrid 38. Freshman, often 40. Pocatello home 42. Asterisk 43. Slanted type 45. IV (alt.) 47. Night before 48. German industrial city 49. “Adam” and “Eve” 51. Minor tennis star Kournikova 53. Loopy 54. Any collection, in mathematics 57. Regarding 59. “___ what they want” 62. Hamming codes et al. 66. Exercise, as power 67. Land of the free 68. Erstwhile ISP, originally one of the world’s largest

69. Origins 70. Best 71. Radical org. from the 1960s 72. Commonest elem. in the universe Down 1. Indep. res. & development 2. Harvest 3. Johnson of “Laugh-In” fame 4. Timekeeping crystal 5. Riot starter 6. Graceful tree 7. Form IV student (abbr.) 8. All-out run 9. Stingy 10. Long dashes 11. Type of polish 12. Skin cream ingredient 13. ’N ___ 18. Not all sports are this 19. Squeeze (out) 24. Post 26. New socialites 27. Little Orphan ___ 28. Castle defenses 29. Operatic highlights 30. Vioxx, e.g. 32. Type of pole 33. Extremely serious 34. Shrek kin 37. Non-folding money 39. Canine nemesis 41. Hurried 44. Guts 46. Clarified 49. Visit a restaurant 50. How retired stallions stand 52. C. Rice’s agcy. before she became Secretary of State 54. Mends 55. Great Lakes city or its lake 56. Wood source 58. Approximately 60. Number before zwei 61. Letters in corp. job postings 63. Anyone over 30, to a high schooler 64. Hip-hop 65. Indefinite (degree)