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Every year, at least 30,000 people — and possibly 10 times that — are infected with the bacterium that causes Lyme disease, most in the Northeast and upper Midwest. Symptoms can include fatigue, joint pain, memory problems and even temporary paralysis. In a small minority of cases, the malaise can persist for many months. So it’s worrisome that in recent decades, Lyme cases have surged, nearly quadrupling in Michigan

Should we worry about the oceans losing oxygen? Hypoxia tends to precede mass extinctions. It was crabbers who first reported something amiss. In 2002, they began pulling in traps full of corpses. (Crabs should be alive when you catch them.) And they mentioned something else: Little octopuses had followed their crab lines to the surface, as if fleeing inhospitable conditions below. Then heaps of dead crustaceans bega