It may be a symbol of the internet age but scientists in South Africa have found an ancient hashtag scrawled on a piece of rock that they believe is the world’s oldest “pencil” drawing.

Blombos Cave drawing with ochre pencil on silcrete stone ... on artifacts from different Stone Age eras and locales. In a study published today in Nature, Henshilwood and colleagues describe ...

This ancient drawing of a salmon in Spain's Pindal ... What's more, she questioned the study's interpretation of the Y symbol. "I am having some difficulty with that in that the majority of ...

Scientists use symbols to represent the different components in a circuit. Symbols are simplified drawings. We use symbols because they are easier to draw and they act as a universal language ...

t may be a symbol of the internet age but scientists in South Africa have found an ancient hashtag scrawled on a piece of rock that they believe is the world's oldest "pencil" drawing. The design ...