Souvenirs: What did you bring home from your last trip to the hospital?
The stuff we carry around says a lot about us. If I were to dump my purse right now, you'd find a shell from my last trip to the ocean, a garnet from a hike up north and a penny pressed from an amusement park. Bacteria tell us a lot about themselves from the stuff (genes) they carry around as well. Just as you can tell where I've been from the contents of my purse, scientists can tell where bacteria have been from the contents of their genes.
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Souvenirs: What did you bring home from your last trip to the hospital?