2022-05-01

科学家表示，响尾蛇已经进化出一种聪明的方法，让人类误以为危险比他们想象的更近。

The sibilant sound of the rattlesnake's tail has long been a cinematic cliche2.

响尾蛇尾巴发出的嘶嘶声早已是大银幕上的常用套路。

That tell-tale rattle1 is made by the rapid shaking together of hard rings of keratin at the tip of the creature's tail. Keratin is the same protein that makes up our fingernails and hair.

这种具有警示作用的咔咔声是由该生物尾部末端坚硬的角蛋白环一齐快速摇动时产生的。这种角蛋白与构成我们指甲和头发的是同一种蛋白质。

In this study, the scientists found a distinctive3 switch to a higher frequency as objects move closer to a western diamondback snake.

在这项研究中，科学家发现，当有物体接近西部菱斑响尾蛇时，蛇尾发出的响动声会明显切换到更高的频率。

When human test subjects were exposed to this change in sound, they believed they were almost on top the snake, when in reality they were safely distant.

当人类受试者暴露在这种声音变化中时，虽然其实他们离蛇还有一段安全距离，但他们会以为自己几乎就站在蛇的上方。