Physics Explorer on Instagram: "Eiderdown is considered more valuable than gold because of its extreme rarity and luxurious qualities. It is collected from the nests of the eider duck, a wild seabird found mainly in the Arctic regions, and only a few thousand kilograms are gathered worldwide each year. Unlike gold, which can be mined in large quantities, eiderdown is obtained without harming the birds, as it is carefully hand-harvested after the ducks naturally leave their nests. Its softness, w