00:00Roman legionaries brace for impact as the massive timber siege engine fires.
00:05This terrifying one-armed military weapon generates enough raw mechanical violence
00:11to shatter stone fortress walls instantly.
00:14Most assume it relies on giant steel springs,
00:17but ancient armies used thick ropes made of animal tendons.
00:22Twisting bundles of sinew and hair stored massive kinetic energy
00:26that hurled heavy boulders across vast battlefield distances.
00:30The violent recoil kicked backwards so fiercely
00:33that Roman soldiers officially named the beast after a wild donkey.
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