The study suggests that a small number of opposite-sex elephants can produce a thriving progeny of thousands if left undisturbed on an island, giving fresh hope to conservationists trying to protect nearly extinct species of large mammals.

"If proven, this fascinating story would demonstrate that very small populations of large mammals can be saved from the brink of extinction (simply by) moving a few individuals, from a seemingly doomed population, to a different and safer habitat," the study published in the Sarawak Museum Journal says.

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