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As a proof of the concept, he constructed a telescope using reflective mirrors instead of lenses as the objective to bypass that problem. [ 66 ] [ 67 ] Building the design, the first known functional reflecting telescope, today known as a Newtonian telescope , [ 67 ] involved solving the problem of a suitable mirror material and shaping technique.
Skin color contrast has been identified as a feminine beauty standard observed across multiple cultures. [7] Women tend to have darker eyes and lips than men, especially relative to the rest of their facial features, and this attribute has been associated with female attractiveness and femininity, [7] yet it also decreases male attractiveness according to one study. [8]