Controversial monkey study reignites animal testing debate

Mother monkeys permanently separated from their newborns sometimes find comfort in plush toys: this recent finding from Harvard experiments has set off intense controversy among scientists and reignited the ethical debate ...

Recordings show some 'mute' animals communicate vocally: Study

More than 50 animal species previously thought to be mute actually communicate vocally, according to a study published on Tuesday which suggested the trait may have evolved in a common ancestor over 400 million years ago.

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