took samples of the reptile skins to my lab at the American
Museum of Natural History. There I used some high-tech machines
to separate the
DNA from everything else.
made lots of copies of the DNA, so it was easier to study.
used a machine to figure out the DNAs sequence, which
looks like a long string of letters. Every animal species has
its own DNA pattern. Geneticists
can match DNA patterns the same way police match fingerprints.