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Frog Resembles X-Men's Wolverine 80

sciencehabit writes "Scientists have discovered a frog with retractable claws that pierce its skin every time they come out. What's more, the researchers believe the frog heals itself after pulling its claws back in."
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Frog Resembles X-Men's Wolverine

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Enzymes are things invented by biologists that explain things which otherwise require harder thinking. -- Jerome Lettvin