英文早点丨0716 - 无奇不有！这种动物没有翅膀，却能靠电飞行数千英里！

蜘蛛朝天吐出一束丝线，然后乘势升上天空，行进数米甚至数百公里，这种“飞行”方式有点类似热气球的升空飞行，故被称为“乘气球”。此前一些观点认为，蜘蛛升空“飞行”，借助的是风或上升暖流的拖曳力。为破解蜘蛛“飞行”的秘密，英国布里斯托尔大学研究人员在排除空气流动等因素、电场可控的实验室环境中开展实验。结果显示，打开电场后，蜘蛛“飞行”行为显著增加，这说明蜘蛛能够探测到大气电场；当蜘蛛在空中时，关闭或打开电场会分别导致蜘蛛向下落或向上飞。

We often hear of people breaking down from overwork,but in nine cases out of ten they are really suffering from worry or anxiety.----Lubbock

In a process called ballooning, arachnids go airborne by climbing to a relatively high point, raising their abdomen, producing silk, and floating away for miles and miles. Now, new research provides a clue to the answer: it turns out the Earth's electric field is closely intertwined with the arachnid's ability to fly.

To see whether spiders respond to this electrically charged field, Morley and colleague Daniel Robert took spiders from the Erigone genus to the laboratory where there's no other stimuli that can spur its flight such as air movement.

文本选自 ：NARTURE WORLD NEWS(自然世界)

作者 ：Naia Carlos

原文标题 ：Spiders Can Fly Thousands Of Miles By Harnessing Earth's Electric Fields, Research Finds

原文发布时间 ：8 July 2018