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段落1

This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?

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When Darwin explored Saint Paul's Rocks off the coast of Brazil, he found just two kinds of birds.

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He wrote: "Both are of a tame and stupid disposition...

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I could have killed any number of them with my geological hammer."

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Darwin's hunch was that creatures living on remote islands were less wary of predators--because in many cases, there weren't any.

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And it seems he was right.

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Because by analyzing dozens of past studies, researchers have found that island lizards are indeed less skittish than their mainland relatives.

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That finding appears in the Proceedings of the Royal Society B.

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Problem is, that mellow island lifestyle could endanger the lizards, if invasive predators show up.

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"The lizards in the islands will be a lot more vulnerable."

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That's evolutionary biologist Theodore Garland, Jr,, a member of the study research team.

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"They will allow those new predators to approach to a closer distance,

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which is going to probably greatly increase the chance that they'll actually be captured by an introduced predator."

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Which suggests that, compared to mainlanders, island fauna don't stand a fighting chance ,unless we keep invasive predators at bay.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.

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