re: Best containers for making large blocks of ice

quote:

---

A friend lives way up north and when they have a big rock in a field he uses water + ice to break it apart since he can't buy dynamite anymore. Drill the holes in the summer/fall and then fill the holes with water and hammer in a thick wooden plug. The water freezes and breaks up the rocks then come spring he moves the smaller pieces.

---

Doesn't have to be frozen for water to break things. Egyptians used to carve grooves in rocks and jam really dry wood into them. The wood was incredibly dry, so when they'd pee on it the wood would expand and break the rocks up.

*NOTE* Heard this from a highschool history teacher. Never researched it myself.