“If you get a new DNA sequence that you’ve
never seen before, you can compare it to all the
other sequences on the database. If it’s something
that’s unrecognized, then it might be a new
species or it might be population variation within
existing species. You don’t know. But comparing
the DNA gives you extra information about the diversity
that’s out there.”—David Johnston,
Biological Researcher, Natural History Museum, London
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