70277784 - convex traffic mirror in large Rossmann warehouse, Burgwedel, near Hanover, Lower Saxony, Germany70477518 - 'Underwater view of a convex crab (Carpilius convexus); Maui, Hawaii, United States of America'71307408 - Young girl playing Yatga - Yatuga (string instrument) at Naadam Festival. Mongolia. The yatga is a half-tube zither with a movable bridge. It is constructed as a box with a convex surface and an end bent towards the ground. The strings are plucked and the sound is very smooth. The instrument was considered to be sacrosanct and playing it was a rite, bound to taboos. The instrument was mainly used at court and in monasteries, since strings symbolized the twelve levels of the palace hierarchy.
