When was National Geographic's famous yellow rectangular border first introduced on the cover of its magazine?

National Geographic has been bringing the wonders of our world into homes for over a century with its distinctive visual identity. Its iconic yellow rectangular border has become synonymous with exploration, science, and stunning photography. This poll tests your knowledge about the evolution of this famous geographic media brand's most recognizable design element. How well do you know the story behind the frame that has framed our understanding of the world?

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1888, with the very first issue of National Geographic Magazine
1910, as part of a comprehensive redesign to establish a stronger brand identity
1935, during the Great Depression to create a more distinctive product on newsstands
1970, when the society shifted focus to environmental conservation and needed a new visual identity