Mark Changizi
Mark Changizi
Mark Changiziis a theoretical neurobiologist, science writer, and author. He proposed the "Perceive the present" hypothesis to understand optical illusions...
apparently commonly culture encounter evolution good seeing selected shaped signs structures system systems visual
Evolution has shaped our visual system to be good at seeing the structures we commonly encounter in nature, and culture has apparently selected our writing systems and visual signs to have these same shapes.
additional bad blood close closeness cone dimension oxygen seems turns variations
This seems like a bad idea to have two cones so close together. But it turns out that the closeness of the M and L cone sensitivities allows for an additional dimension of sensitivity to spectral modulation. Also, their spacing maximizes sensitivity for discriminating variations in blood oxygen saturation.