10万年前，地球正处在一个相似的气候稳定期末端，这个时期被称为桑加蒙间冰期。那时可能也有一个像我们现在这样高度发达的生态系统。
A hundred thousand years ago , Earth was near the end of a similar period of climate stability . It was called the Sangamon interglacial , and it probably supported a developed ecology that would look familiar to us .
桑加蒙间冰期