The reason is a microscopic organism called Toxoplasma gondii.

原因在于一种叫做刚地弓形微生物。

Definitely behaviour that is beneficial to toxoplasma, but absolutely not for the rodent.

绝对是有益于弓形行为，但绝对不是啮齿动物。

These creatures had grasping hands, arched backs, and thick muscular tails.

这些生物有紧握手、弓形背部和粗壮肌肉尾巴。

Rodents that get infected with toxoplasmosis actually makes these rodents attracted to cat urine.

感染弓形啮齿动物实际上会被猫尿所吸引。

A similar process happens with toxoplasma and mice which breeds in the digestive system of cats.

类似过程发生在猫消化系统中繁殖弓形和老鼠身上。

In fact it's one of the most stable arches in nature, so sound that we still use it today.

事实上，这是自然界中最稳固弓形之一，如今我们仍然常常用到。

Billy advanced and drew away the drapery which screened the alcove of the bow window.

比利上前拉开遮住弓形窗壁龛窗帘。

We're talking about toxoplasmosis, a disease caused by toxoplasma gondii.

我们说是弓形，一种由弓形引起。

Rather, it's because this is a perfectly--this is the adaptive strategy of the toxoplasmosis virus.

相反， 这是弓形毒完善适应策略。

" Oh, Dodo, " said Celia, " will you not have the bow-windowed room up-stairs" ?

“哦，多多，”西莉亚说，“你不要楼上那间带弓形窗房间吗？”

Smaller bows may be seen in the gorge on the plateau between the Upper and Lower Falls.

在上瀑布和下瀑布之间高原峡谷中可以看到较小弓形。

Now, but wait. If animals and humans evolved to prevent susceptibility to toxoplasma, why did DD get it?

等等，回过头来，如果动物和人会演化出抵抗弓形能力，那为什麽DD会发呢？

If you are a rat and you have toxoplasmosis, you are perfectly healthy except for one thing.

如果你是只患有弓形老鼠，除了一件事外， 你是健康。

So is toxo manipulating our brains as an evolutionary strategy to get predatory cats to eat us?

那么，弓形操纵我们大脑是否是一种让掠食性猫科动物吃掉我们进化策略？

For example, mice infected with Toxoplasma were quicker to check out the far reaches of an elevated maze than their uninfected comrades.

例如，相比未感染老鼠，感染弓形老鼠会更快地检查遥远高处迷宫。

There's some recent research that ties schizophrenia to the possibility of toxoplasmosis, which is a disorder carried by cat feces.

最近一些研究将精神分裂症与弓形可能性联系起来，弓形是一种由猫粪便携带。

Its bow-mounted camera looks like a device that cyclists might strap to their helmets (it has a larger one, pictured, mounted amidships).

它弓形摄像头看起来像是骑自行车人可以绑在头盔上装置（它有一个更大摄像头，如图所示， 安装在船中部）。

Wolves infected with toxoplasma are more likely to wander away from their former pack to find a new one and are more risk-taking, more bold.

感染弓形狼更有可能离开原来狼群去寻找新狼群，而且更冒险，更大胆。

But mice aren't the only animals that end up with these parasites, and that's where humans, and all of toxo's other hosts, come in.

但是老鼠并不是唯一最终感染这些寄生动物，而这正是人类和弓形所有其他宿主进来地方。

On such evenings Margaret was apt to stop talking rather abruptly, and listen to the drip-drip of the rain upon the leads of the little bow-window.

在这样晚上，玛格丽特很容易突然停止说话，倾听雨滴打在小弓形窗引线上声音。