Ancient grinding bowl found on Mars

On January 18, 2015, a curious object has been discovered by a Youtube user on Mars on a photo published on NASA. According to Scott C. Waring, it might be an ancient grinding bowl.

Scott C. Waring explains:

This is a cool discovery made by Youtube user "Mars Moon Space Photo Zoom Club." It shows a bowl made from the local stone. Its carving is very reminiscent of the American Indian stones they made to grind their food. The face that this bowl is held up by its legs makes it even more evident that it was made by intelligent beings. SCW

NASA photo: