How can transgenic animals affect human life?
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The existence and nature of emotions in animals are believed to be correlated with those of humans and to have evolved from the same mechanisms. Charles Darwin was one of the first scientists to write about the subject, and his observational (and sometimes anecdotal) approach has since developed into a more robust, hypothesis-driven, scientific approach.[1][2][3][4] Cognitive bias tests and learned helplessness models, have shown feelings of optimism and pessimism in a wide range of species including rats, dogs, cats, rhesus macaques, sheep, chicks, starlings, pigs, and
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