Confederate submarine crew killed by their own weapon

A powerful shockwave from the H.L. Hunley’s own weapon killed the crew of the Confederate combat submarine as it sunk a Union ship. This finding comes from a four-year research project that involved repeatedly setting blasts near a scale model, shooting authentic weapons at historically accurate iron plate and many calculations on human respiration and the transmission of blast energy.
Strange & Offbeat: Fossils & Ruins News — ScienceDaily