21. Coke can
Top of a Coke can cut in half. Explanation on that and much more thanks to Bill the engineer guy.
22. Submarine
Soviet submarine Cut in Half . Photo taken on a shipyard during the dismantling.
23. Zippo
Cross section of an old Zippo lighter.
24. Agate shell
Perfect agate shell cut in half.
25. Pyritized Ammonite
Cut in half Pyritized Ammonite