How do our eyes and brains work together?

15 November, 2018
Getting a shot is no fun. Just thinking about getting the shot before it happens can feel uncomfortable, even downright scary. The anticipation might be worse than the shot itself. Why do we have to get shots? And how... A circle made of points, shown here with small white balls, appears to roll around the inside edge of a larger circle, but is that what's really happen
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