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Sketching is one of the oldest art forms that we know of. Neanderthals and early humans mixed pigments with other substances to create rudimentary drawings for thousands of years before the invention of paint or pencils.
The oldest (so far) drawings have been found in the Maltravieso cave in Spain with scientists dating it older than 64,000 years. Through the centuries, humans excelled at putting their imaginations onto a permanent medium.