The cast of characters may have changed, 角色阵容也许已经改变
none of these survivors would have had a chance to rule. 这些幸存者都不可能有机会统治世界
But the birds didn't have the planet to themselves. 但鸟类并未独占地球
have repeatedly engulfed vast swathes of our planet. 反复地吞没地球上的广阔区域
Throughout history, volcanoes have been one of the greatest agents of change. 纵观历史 火山一直是最大的变化因素之一
...ensuring their young have the best possible start. 确保后代拥有最佳的初始条件
Some will have genetic qualities that help them survive. 有一些具有帮助其生存的遗传特性
And yet, they are just 1% of all species that have ever existed. 但这只是曾经存在过的物种中的1%
we'll meet many of the 99% that have gone extinct... 我们将遇见 已经灭绝的99%中的许多物种