Answer: From observing the static structure of the body, Leonardo proceeded to study the role of individual parts of the body in mechanical activity. This led him finally to the study of the internal organs; among them he probed most deeply into the brain, heart, and lungs as the “motors” of the senses and of life.
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Indoctrination of children, use of social media, changes to education system, propoganda such as "love is love" etc.
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Scientists believe that early human beings may have originated in Africa.
One of the main reasons why foreign interest in Persia and Saudi Arabia increased in the first half of the twentieth century was because of their massive amounts of oil reserves.