Mark Hahn and Diana Franks, Woods Hole Oceanographic Institution (IMAGE)

Woods Hole Oceanographic Institution

Mark Hahn and Diana Franks, Woods Hole Oceanographic Institution

Caption

"It's a fascinating example of how human activities can drive evolution," said Mark Hahn, shown here at work in the lab with biologist Diana Franks.

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Photo by Tom Kleindinst, Woods Hole Oceanographic Institution

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