Drawing has existed for over 35,000 years, originating with prehistoric cave drawings of animals. Egyptian drawings later evolved with balanced, colorful temple art. During the Roman era, technical drawings were used to illustrate buildings and engineering projects. Not until the 14th century did drawing emerge as an independent art form with the widespread availability of paper for sketching and experimenting. Starting in the 15th century, artists used techniques like shading and perspective to create more realistic drawings of the human form and study of light. In the 19th century, drawing diversified into multiple styles including Surrealism, Romanticism, Expressionism, Cubism, and Futurism.