So the preservation and the survival of DNA depends on many factors, and I have to admit, most of which we still don't quite understand, but depending upon when an organism dies and how quickly he's buried, the depth of that burial, the constancy of the temperature of that burial environment, will ultimately dictate how long DNA will survive over geologically meaningful time frames. And it's probably surprising to many of you
保护措施和DNA的存活将依靠很多方面因素 另外我不得不承认 还有很大一部分仍旧是未解之谜 但依据生物死亡的时间 以及掩埋的速度和深度 还有掩埋环境温度的稳定性 我们可以从地质学角度的有效时间范围内 得出DNA还能存活多久 对这里的大多数人来说，这可能有些不可思议