萨拉·刘易斯（TED演讲：萤火虫的爱情与谎言）过去20年来一直致力于研究萤火虫。她最初的兴趣源于对这种甲虫如何凭空发光的好奇，但探索很快延伸到了更根本的问题：萤火虫是如何交配的，交配时又会发生什么？（上图右侧展示的是两只正在交配中的萤火虫。）事实证明，萤火虫的交配行为存在她所说的”令人惊喜的新发现”。她说：”在交配过程中，雄性不仅会将精子传递给雌性，还会赠予一份富含营养的包裹，称为’婚礼礼物’。”（即图左侧那个半透明的螺旋状物体。）刘易斯补充道：”这份礼物之所以珍贵，是因为其中富含蛋白质，雌性将用它来为卵提供营养。”因此，雌性萤火虫会仔细评判潜在伴侣的闪光信号，以判断哪位求偶者能带来最丰厚的”礼物”。”这份’聘礼’有助于雌性产下更多的卵，最终将更多的后代送入下一代。”
[ted id=2001]
图片由萨拉·刘易斯提供。
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