Laziness may be an effective survival skill, study finds. Researchers analyzed the energy used by mollusks—snails, scallops, mussels, slugs—and found species that survived over millions of years possessed a "statistically significant difference" in their metabolic rates than those that went extinct.

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Laziness may be an effective survival skill, study finds. Researchers analyzed the energy used by mollusks—snails, scallops, mussels, slugs—and found species that survived over millions of years possessed a "statistically significant difference" in their metabolic rates than those that went extinct.