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Evolutionary advantage often makes for show-stopping stuff — a cheetah’s speed, for example, or a moth’s almost perfect mimicry of tree bark. In some snails, however, it’s simply down to a poor fit with a snake’s jaw.

Some species of Satsuma snail have shells that coil to the left, which probably evolved because the snakes that prey on them have jaws specialized for feeding on the molluscs’ right-coiling ancestors, a study published today in Nature Communications suggests.

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Why turtles, and why now? Turtles are disappearing from the planet faster than birds, mammals, and even amphibians. Today, over 40% of turtle species are identified as threatened with extinction; the primary threats are human-caused.  However, it’s not too late for our turtle heritage to be salvaged.  The United States has more endemic turtle species than anywhere on Earth; a turtle biodiversity hotspot.  Our careful stewardship can preserve the rare species and keep ‘common species common.

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