Yet some questions remain unanswered.Why was it that some species died out, and others survived, some to this day (famous example: the coelacanth).

• 直到现在有些问题还是无解,为什么有一些物种会死绝而其他的能够生存,有一些能活到今天(一个著名的例子是:腔棘鱼)。