ナショナルジオグラフィックのインスタグラム(natgeo) - 7月27日 19時38分

Photograph by @paulnicklen // A polar bear swims effortlessly through Lancaster Sound, Nunavut. Did you know that polar bears actually have super powerful tendons that force their front paws to fold over as seen here? They have to use energy to stretch their paw out straight. This ends up acting like a spring when they are walking across the sea ice. #followme on @paulnicklen to see this physiological adaptation in use. #nature #naturelovers @natgeocreative @thephotosociety

[BIHAKUEN]UVシールド(UVShield)

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