00:00Ancient walls absorbed catapult blasts and regenerated. This will disturb you.
00:05A special, liquid stone, composite actually flexed and re-hardened instantly.
00:11This material contained living bacteria that consumed damage.
00:15They ate cracks, then secreted new, solid stone. The wall grew stronger.
00:21These incredible living walls protected cities, absorbing endless attacks, truly disturbing.
00:27More ancient secrets at the link in bio.
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