00:00Ancient invaders smash relentlessly against the massive stone barriers of the Ming Dynasty.
00:05Thousands of miles of towering masonry endure brutal freezing winters and massive tectonic faults, without cracking.
00:14Common sense says hard rock needs standard cement, but ancient builders threw out the rulebook.
00:20Workers mixed boiling rice soup straight into the lime mortar to create an unbreakable chemical bond.
00:26Starch molecules locked the bricks together forever, so that ancient invaders smashed relentlessly against the massive stone barriers of the
00:36Ming Dynasty.
