When did Nature Develop Colors

When viewed under ultraviolet light, ripe blueberries shine brightly against dark leaves, demonstrating how vibrant colors send strong visual signals that have been a fundamental part of nature's communication for hundreds of millions of years. In this episode, we explore the chicken-and-egg conundrum of whether bright colors first appeared as evolutionary billboards or if eyes capable of reading them evolved first. We examine how evolutionary biologists Zachary Emberts and John Wiens analyzed 500 million years of fossil and genetic data in 2025 to conclude that basic color vision appeared at least 100 million years before most colorful signals. Finally, we trace how ancestral vertebrates possessed four types of cone opsins around 500 million years ago—initially driven by needs like navigating complex underwater environments or improving edge detection—before nature eventually painted the rainbow onto skins, petals, and shells.