Why are the Trinil shell engravings significant for the history of art?

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Side-view illustration of a Homo erectus individual, depicted with a robust, upright body covered in hair, walking with one arm bent. A scale bar beside the figure shows measurements in inches and centimeters. — Homo erectus Artist's rendering of *Homo erectus*, which lived from approximately 1,700,000 to 200,000 years ago.

The Trinil shell engravings are significant because they may represent the world’s oldest known geometric engravings, suggesting that Homo erectus could have been the first species to create art.1

Found at the Trinil deposit in Java, Indonesia, these zigzag etchings date back approximately 430,000 to 540,000 years. This discovery is notable in the history of art because it pushes the timeline for the emergence of artistic expression and symbolic behavior significantly further back than previously recognized, potentially attributing such cognitive capabilities to H. erectus rather than exclusively to later hominin species.1