By Paula Olson, NOAA - http://www.fisheries.noaa.gov/pr/species/mammals/porpoises/vaquita.html, Public Domain, https://commons.wikimedia.org/w/index.php?curid=30588208

The ocean’s rarest mammal has a few final lessons to teach us

A tiny porpoise called the vaquita has polarized a Mexican fishing town. The species is fighting for its life.

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