[crater] This crater forms part of a merged pair with Helmert to the south. There is a gap in the sides of the crater where they are joined together, and they share a common floor that has been resurfaced by lava. The outer rim of this crater now forms little more than a shallow ring in the surface, with the rim lowest along the northern si... Found on http://en.wikipedia.org/wiki/Kao_(crater)
A kaō or huāyā is a stylized signature or a mark used in east Asia in place of a true signature. ==History== Kaō first appeared in China during the Tang Dynasty, and began to be used in Japan during the Heian period. Though their use became far less widespread after the Edo period, they continue to be used even by some contemporary politicians... Found on http://en.wikipedia.org/wiki/Kaō