At its peak, almost half the world was covered in ice, 巅峰时期 世界上将近一半区域被冰覆盖
the planet was plunged into an ice age. 地球突然陷入冰河期
The fatal freeze was caused by a 60% drop in carbon dioxide. 致命的冰冻 是由二氧化碳减少60%所导致
...a development that was to have dire consequences. 这将带来可怕的后果
The arrival of predation was a seismic shift in the ancient seas. 捕食者的出现 是古代海洋中的一次颠覆性转变
it's still possible to get a glimpse of what that next wave of life was like. 我们依然可以一窥 之后一波生命浪潮的模样
life as we know it was impossible. 我们所知的生命不可能存在
Nearly 90% of its surface was water, 当时的地表将近90%由水覆盖