Abrupt Climate Change Also Occurred NATURALLY In The Past …25 Times During Last Ice Age
已发表的研究表明，科学界早已认识到地球历史上明显更加极端和快速的温度变化。后突变气候变化在过去也自然发生过……上一个冰河时期有 25 次首次出现在 Watts Up With That? 上。
First Americans quiz: How much do you know about the first people to reach the Americas?
第一批美国人在最后一个冰河时期来到这里，但你对他们了解多少？
