00:00Ocean pressure makes tunnels stronger?
00:02That breaks every rule you learned.
00:05Instead of crushing, immense water pressure actually squeezes the tunnel tight.
00:10Engineers design these structures to use that force.
00:13It becomes a permanent, self-sealing embrace.
00:17External water pushes inward.
00:19This pressure compacts joints, sealing small cracks instantly.
00:23So ocean pressure makes tunnels tougher.
00:27Discover more wild engineering secrets at the link in bio.
