Many thyroid growths never develop into dangerous cancers, and overdiagnosis can lead people to have unnecessary surgery.
許多甲狀腺的成長, 永遠不會變成一個危險的癌症, 和overdiagnosis可以引導人們有不必要的手術.
消失的北極冰蓋| 冷凍星球| 發現
www.discovery.com/tv-shows/frozen.../vanishing-arctic-ice-cap/
看到自己：北極冰如何消失 - 國家地理
ngm.nationalgeographic.com/2016/01/arctic-ice-shrinking-graphic-environment-text
由於衛星開始定期測量北極海洋冰在1979年，它在範圍和厚度急劇下降。
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One recent anthrax outbreak was blamed on an infected reindeer, frozen for more than 75 years. via BBC Earth
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