ACROSS

1. Marked by lack of intellectual depth
5. Tropical constrictor
8. Information
12. Second nature
13. Sloppy person's place of birth?
14. Football end
15. Frosted
16. Capital of Norway
17. Tiresomely boring
18. '06 NFL MVP
20. South American tuber, pl.
21. Burning crime
22. Extra point
23. Deficiency of red blood cells
26. Old school football
30. Lincoln material
31. Quarterback sign, e.g.
34. Alleviate
35. Charted record
37. On which a house sits
38. More than one asylum
39. Verdi's popular opera
40. Concerning this
42. Old-fashioned over
43. Kodak founder
45. Seashores
47. One of these plays in St. Louis
48. Loathe
50. Past participle of "lie"
52. Total teams in NFL
56. Haze over
57. Oxen connector
58. Extra dry
59. Mortar and pestle stone
60. Pleaded
61. Botticelli's Venus, e.g.
62. High rocky hills
63. Lemmon and Matthau together
64. Witnesses

DOWN

1. Wayne movie "True ____"
2. Crazy
3. One thing on a list
4. Pandemonium
5. He has the lowest voice
6. Acrylic fiber
7. In a little while, old-fashioned
8. Bishops' jurisdictions
9. Title for Turkish military leader
10. Therefore
11. Cash machine
13. Dwarfed tree
14. Flip-flop
19. 3/17 celebrants
22. O in OPEC
23. Aquarium scum
24. Water wheel
25. Archaic exclamation of surprise
26. Top of the head
27. Knock outs
28. Small island
29. Approaches
32. A valley in Scotland
33. ____ is to "neither" as "or" is to "either"
36. Won 3 of last 6 Super Bowls
38. Walking
40. Overact
41. Made ochre
44. Skin disease of dog
46. Prehistoric people who spoke Indo-European
48. Near the wind
49. Rode a bike
50. Kids' building block
51. From a great distance
52. Mistake in print
53. T on a test
54. W of football's WR
55. Lyric poems
56. Vampire's transformation