That’s what I found out when I went to visit my friend Rich Zack, a scientist at Washington State University who knows a lot about insects and spiders.
Zack explained that spiders have a number of small lenses on the top of their heads. These simple lenses let them see changes in light and dark. It’s probably a pretty blurry view, he said.
There are more than 40,000 spider species on Earth. We can often identify a spider by counting its eyes and seeing how they are arranged.
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