We've got hundreds of millions of those light sensing cells in our eyes.

我们的眼睛里有上亿个感光细胞。

Now most jumping spiders only have two types of color sensing cells in their big old cute main eyes.

大多数跳蛛在它们可爱的大眼睛里只有两种颜色感应细胞。

It was none other than Charles Darwin who showed that the gravity sensing cells lived in the tip of the root, cut them off and the plant doesn't know which way is down.

正是查尔斯·达尔文展示了重力感应细胞生活在根尖，将它们切断，那么植物就不知道哪个方向向下了。

The frontier is now not so much at the animal behavior level but actually getting inside the brains of these animals and trying to find these sensing cells and connecting them to the neural circuitry.

现在的前沿问题不是在动物行为层面，而是实际进入这些动物的大脑，试图找到这些感应细胞并将它们与神经回路连接起来。