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STs are first attracted to the illuminated lever before accepting the food reward. GTs, however, show no interest in the lever, going only to the food dispensing area.

STs are first attracted to the illuminated lever before accepting the food reward. GTs, however, show no interest in the lever, going only to the food dispensing area.

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We study some properties of a triad of circles associated with a triangle. Each circle is inside the triangle, tangent to two sides of the triangle, and externally tangent to the circle on the third side as diameter. In particular, we find a nice relation involving the radii of the inner and outer Apollonius circles of the three circles in the tria...