Shells
Shells are outer calcareous skeletons of shell dwellers that consist of three layers: the outer one (conchiolin), middle (porcelain) and inner (pearl, built of tiny calcareous blades). Shells are of various sizes, shapes and colors, it depends among others on the kind of a shell dweller, its age and the place of occurrence. Mollusks are the best known shell dwellers and the variety of their shells is the largest. Shells – especially of rare species – are considered to be collectibles. Rumor has it that when one attaches a shell to an ear it is possible to hear sea humming. However, in reality it is a hum of blood in blood vessels located in a human hearing organ that is echoed from the inside of a shell.
1. 13:58 (11:03 +2:55)
score: 1000







2. 14:26 (11:36 +2:50)
score: 700






3. 25:52 (23:42 +2:10)
score: 500



4. 26:55 (19:40 +7:15)
score: 400






5. 27:22 (22:52 +4:30)
score: 390



6. 28:44 (25:14 +3:30)
score: 380

7. 28:52 (25:27 +3:25)
score: 370





8. 31:55 (28:50 +3:05)
score: 360


9. 35:53 (33:08 +2:45)
score: 350

10. 35:55 (23:05 +12:50)
score: 340



11. 36:21 (27:36 +8:45)
score: 330


12. 37:00 (25:15 +11:45)
score: 320





13. 38:10 (23:05 +15:05)
score: 310







14. 38:12 (21:57 +16:15)
score: 300





15. 38:17 (25:17 +13:00)
score: 290




16. 39:51 (22:01 +17:50)
score: 280




17. 40:16 (26:36 +13:40)
score: 270



18. 41:30 (25:45 +15:45)
score: 260






19. 41:59 (31:29 +10:30)
score: 250





20. 42:05 (31:20 +10:45)
score: 240



21. 42:07 (32:47 +9:20)
score: 230




22. 42:08 (22:48 +19:20)
score: 220




23. 42:38 (36:08 +6:30)
score: 210




24. 42:45 (32:45 +10:00)
score: 200





25. 44:54 (25:04 +19:50)
score: 190




26. 45:17 (35:32 +9:45)
score: 180




27. 45:19 (38:49 +6:30)
score: 170




28. 45:38 (29:08 +16:30)
score: 160





29. 46:51 (36:36 +10:15)
score: 150







30. 46:54 (32:54 +14:00)
score: 140




Winners' comments
Shells
03.10.2011 17:20
Great fun! Thank you.
deb 

