04/12/2025
🔍 The Only Mammal with Seasonally Changing Eye Color: The Reindeer
Arctic reindeer have an incredible adaptation: Their eye color changes with the seasons!
☀️ In summer, their tapetum lucidum reflects golden light, helping them see clearly in bright conditions.
❄️ In winter, prolonged pupil dilation increases eye pressure, shifting this layer to reflect blue light — making their vision up to 1000 times more sensitive in the dark.
🌌 Nature’s engineering at its finest.
