April 5, 2017 HERE I WAS, DIGGING IN THE SAND ALONG THE MEXICAN SHORES OF HUATULCO, A SLEEPY LITTLE TOWN WITH NATURAL COVES, LAGOONS, AND MAGNIFICENT CLIFFS OVERLOOKING THE ENDLESS OCEAN. THIS WAS NO VACATION, THOUGH. I WAS ON A MISSION — TO SEARCH OUT A PARTICULAR SNAIL AND TEST IF ITS SECRETION COULD BE…
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