00:00Torsion-powered iron bolts pierce dense wooden shields with lethal kinetic force.
00:05Twisted animal tendon springs store immense mechanical potential energy to shatter overlapping
00:11bronze armor plates. Most people assume thick iron springs powered these monstrous weapons,
00:17but metal alloys failed completely under tension. Hellenistic engineers twisted hundreds of animal
00:24sinew strands into elastic bundles that stored explosive torsional energy. Tension sinew bundles
00:31stored immense mechanical energy, propelling heavy iron-tipped bolts with enough force to
00:36penetrate multiple rows of shields in ancient warfare. By the way, your website is your first
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