See the first image of a black hole, our solar system and beyond
Perhaps the first industrial-age war, the Civil War saw a revolution in figthing technology.
The HunleyConfederate Submarine H.L. Hunley (1863-1864) Sepia wash drawing by R.G. Skerrett, 1902, after a painting then held by the Confederate Memorial Literary Society Museum, Richmond, Virginia. U.S. Naval Historical Center Photograph