We didn't evolve with cartoons and TV and video games around or even spinning picture discs, but being able to sense motion, even the illusion of motion, has been a big part of our specie's survival.

我们的进化并不是伴随着卡通、电视和视频游戏，甚至是旋转的图片光盘，但是能够感知运动，甚至是运动的幻觉，是我们物种生存的重要组成部分。

Maybe 99 times out of a hundred that wasn't a tiger in the grass, it was just an illusion of motion, but our only ancestors who survived are the ones whose motion detectors got it right the hundredth time too.

也许百分之九十九的人认为那不是草丛中的老虎，那只是运动的幻觉，但是我们唯一幸存下来的祖先是那些运动探测器也第一百次正确的祖先。