Fish scale the surface, interacting only with the riblet tips, not causing any high-veloctiy flow in the valleys. Since this high velocity flow now only interacts with the riblet-tip, which is a very small surface area, the momentum transfer which causes drag is now much lower than before, thereby effectively reducing drag. Also, this reduces the cross-stream velocity fluctuations, which aids in momentum transfer too. The rough, sandpaper-like texture of shark and ray skin, coupled with its toughness, has led it to be valued as a source of rawhide leather, called shagreen. One of the many historical applications of shark shagreen was
Lampshades made from human skin tries to soften Hitler's heart by giving him a kitten, but when Hitler sees the birthmark, he has Eva Braun kill Lenny to make him into a lampshade for their bedside table lamp. Near the end of the film, in what appears to be an act of God, the swastika transforms into the Star of David. In 2010 author Mark Jacobson published "". In it he described how after Hurricane Katrina he uncovered a lamp which he believed to be made of human skin, and which may have come from a Nazi concentration camp. Initial flawed DNA testing appeared to