It may look like a scribble on a rock, but according to archaeologists, it's the earliest known drawing created by man:
Dating back some 73,000 years, the mysterious picture consists of three lines intersected by six angled lines, like a more complicated version of the hashtag (#).
The picture was unearthed at Blombos Cave, a site about 300 kilometers east of Cape Town. The cave was frequented by humans as early as 100,000 years ago and is packed with evidence of tool-making and symbolic designs.