They migrate thousands of kilometres to find stable sea ice during Antarctic summer to wait out what is called a "catastrophic moult" every year.
第一百零四条 检查的情况应当制作检查笔录，由检查人、被检查人和见证人签名、盖章或者按指印；被检查人不在场或者被检查人、见证人拒绝签名的，人民警察应当在笔录上注明。
，推荐阅读旺商聊官方下载获取更多信息
圖像來源，AFP via Getty Images
Chris BaraniukTechnology Reporter