A mysterious man drifted ashore in the Marshall Islands last week, and his story is almost unbelievable—but is it too unbelievable? A refresher: Jose Salvador Alvarenga says he and a teen named Ezekiel set out from Mexico in December 2012 and ended up adrift at sea; Ezekiel perished, but Alvarenga says he survived on a diet of turtles, fish, birds, and rainwater for 13 months. If that was indeed the case, the AP notes, it "would rank among the greatest tales ever of survival at sea." But many have observed that when Alvarenga was found, he didn't appear emaciated. His ankles and other parts of his body looked puffy, says US ambassador Tom Armbruster, and he seemed generally healthy. So is the story true? The Guardian shares details from Mexican officials that lend some credibility: