フィラデルフィア美術館のインスタグラム(philamuseum) - 2月27日 22時30分

Happy #NationalPolarBearDay. The #polarbear's stark white coat provides camouflage in surrounding snow and ice. But did you know that under their fur, polar bears have black skin—the better to soak in the sun's warming rays. “Chilly Observation,” 1889, by Charles Sidney Raleigh.

[BIHAKUEN]UVシールド(UVShield)

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