The bright flash occurs because when sperm enters an egg it leads to a surge of calcium which triggers the release of zinc from the egg. As the zinc shoots out, it binds to small molecules which emit a fluorescence which can be picked up by camera microscopes.
Shibori is a Japanese technique of creating designs in dyed fabric. It is a dye-resist technique, using items that bind the fabric to create areas where the dye will not penetrate. Depending on the materials used and how the fabric is bound, the dyed designs vary from random splashes of color to highly symmetrical patterns.
What is shibari? In Japanese, âshibariâ simply means âto tieâ. The origin of shibari lie in the Edo period of Japan during which the Samurai would use rope for capture and restraint of criminals (a martial art called Hojo-jutsu). It isnât until the the early 1900âs however, after the end of the Edo period, that rope bondage becomes a source of erotic imagery in drawings and paintings.