Seeing green for survival Our ancestors – both human and, before them, primate – lived in dense, green habitats. Here, over many years, they developed a fine-tuned ability to distinguish between different tones of green. This was a necessary adaptation for survival. Being able to differentiate between slight nuances in colour helped them find ripe food, spot predators hiding in the foliage, and identify toxic plants, thus giving them an evolutionary advantage in a challenging environment.
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