It's possible that we have actually identified dinosaur DNA in fossilized cartilage of a duckbilled dinosaur.
No, this doesn't make Jurassic Park possible, and even if it is DNA (which seems likely but has yet to be independently confirmed) we're probably not going to get a full sequence.
But even a few dinosaur genes will tell us something, especially about how they are related to modern birds. (Emus, anyone?)
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