那您要与整个DNA链一起工作吗？格兰特问。哦，不，吴说。那是不可能的。从六十年代开始，我们已经走了很长一段路，当时整个实验室花了四年的时间来解码这样的屏幕。现在，计算机可以在几个小时内完成。但是，即便如此，DNA分子太大了。我们仅查看各种动物之间或与当代DNA不同的链部分。从一个物种到另一种物种，只有几个核苷酸不同。这就是我们分析的，这仍然是一项艰巨的工作。
(Then are you working with the entire DNA strand? Grant asked. Oh no, Wu said. That's impossible. We've come a long way from the sixties, when it took a whole laboratory four years to decode a screen like this. Now the computers can do it in a couple of hours. But, even so, the DNA molecule is too big. We look only at the sections of the strand that differ from animal to animal, or from contemporary DNA. Only a few percent of the nucleotides differ from one species to the next. That's what we analyze, and it's still a big job.)