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第1段

1 .This is Scientific American 60-Second Science. I'm Christopher Intagliata.

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2 .We humans enjoy coffee and tea, to give our brains a caffeine boost.

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3 .And bees sometimes sip nectar that naturally contains caffeine, which seems to enhance their memory.

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4 .Now a study suggests that bees enjoy another familiar drug produced by plants: nicotine.

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5 ."As it turns out, not just in humans, but even the bees seem to have difficulties quitting."

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6 .Lars Chittka, a professor of behavioral and sensory ecology at Queen Mary University of London.

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7 .Chittka and his colleagues studied bumblebees as they visited fake flowers that contained varying levels of nicotine.

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8 .Unnaturally high nicotine concentrations deterred the bees.

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9 .But at real-world levels, the drug attracted bees.

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10 .And they even learned a flower's color faster, if that flower offered a nicotine fix.

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11 .Sometimes bees paid a steep price for this preference.

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12 ."They returned actually to flowers that had previously sold them nicotine, so to speak, even if these flowers no longer contained nectar.

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13 .Which might give nicotine-pushing plants, like tobacco, an edge.

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14 ."It provides these plant species with an unfair advantage over competing plants, because they can retain the faithful services of pollinators, even if they're offering suboptimal nectar in this case."

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15 .The results are in the journal Scientific Reports.

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16 .And if caffeine and nicotine have these effects on bees?

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17 .Perhaps natural floral pharmacies stock other drugs too-that enhance pollination, and give bees a buzz.

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18 .Thanks for listening, for Scientific American 60-Second Science. I'm Christopher Intagliata.

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