ANSWER: The first missiles to be used operationally were a series of missiles developed by Nazi Germany in World War II. Most famous of these are the V-1 flying bomb and V-2 rocket, both of which used a mechanical autopilot to keep the missile flying along a pre-chosen route.
Answer:
In the 7th century, a change occurred in the deserts of Arabia that would end up changing the face of the world. From the deserts of Arabia, the Arabs would emerge and challenge perhaps the two greatest empires of their time. They would defeat these great empires in battle after battle. Nothing would be able to stop them. They would face their enemies outnumbered and outmatched, with a new faith within their hearts, and emerge victorious. From the victories would rise Arab empires that have since been unmatched, the Ummayads and Abbasids.
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Ladd-Franklin's mathematical interests ultimately led her to make important contributions to the field of psychology. In 1886, she became interested in the geometrical relationship between binocular vision and points in space and published a paper on this topic in the first volume of the American Journal of Psychology the following year. During the 1891-92 academic year, Ladd-Franklin took advantage of her husband's sabbatical leave from Johns Hopkins and traveled to Europe to conduct research in color vision in the laboratories of George Müller (1850-1934) in Göttingen, and Herman von Helmholtz (1821-1894) in Berlin, where she also attended lectures by Arthur König. In contrast to the prevailing three-color and opponent-color explanations of color vision, Ladd-Franklin developed an evolutionary theory that posited three stages in the development of color vision. Presenting her work at the International Congress of Psychology in London in 1892, she argued that black-white vision was the most primitive stage, since it occurs under the greatest variety of conditions, including under very low illumination and at the extreme edges of the visual field. The color white, she theorized, later became differentiated into blue and yellow, with yellow ultimately differentiated into red-green vision. Ladd-Franklin's theory was well-received and remained influential for some years, and its emphasis on evolution is still valid today.
<span>Joseph Ephraim Casely Hayford observed that
it is basically the instinct of the primitive man that works in the society, no
matter what the scope of their bragged civilized nation. Based from Hayford, the
civilized nations of our world are now comparable to primitive man, different universal
courts of negotiation will be more regularly be seeing in one capital in Europe,
and the not so strong country will have slight peacetime, if not slight fairness.</span>
