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What do you  see with?

  Two of these?


Or eight of these?


Or thousands of these?



No matter how many eyes you have or what they look like, you need four things to be able to see.   



Something for light to bounce off of.


An eye, N, or lots of them - NNNN!  Eyes catch the light that bounces off of things.  Then eyes turn the light into messages and send them to the brain. 

bullet A brain to figure out what the messages mean.

Find out why we don't see colors at night!  Click next!

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