They migrate thousands of kilometres to find stable sea ice during Antarctic summer to wait out what is called a "catastrophic moult" every year.
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美國總統特朗普回應赫斯言論時稱其為「真正的輸家」，而谷愛凌是公開聲援赫斯及其他發聲運動員的數名選手之一。
Letter to the Norwegian authorities