Optical Illusions Black Dot Keep staring at the black dot in the center. After a while, the gray haze around it will appear to shrink. More Black Dots How many black dots do you see? Check out "69 Optical Illusions & Visual Phenomena" by Michael Bach.		Home About Us Plan Your Visit Donate Membership Get Involved! Find Us on Facebook! Birthday Parties Events Summer Camps WIDGET Contest Science Clubs Exhibits in the Gallery Educational Activities & Links     What's This?     Links for Educators     Air Pressure     Chemical Reactions     Optical Illusions Educators Visiting Scientists Series Einstein on Wine Traveling Exhibits Sign up for e-news Contact Us
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