In the 1950s, a famous experiment of rhesus monkeys reared with terry-cloth and wire-mesh "surrogate mothers" provided evidence that the development of emotional ties between infant and mother does not depend on hunger satisfaction.
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The name "Rhesus" is reminiscent of the minor character of Iliad, the mythical Thracian king Rhesus. However, the French naturalist Jean-Baptiste Audebert, who named the species, said that "it doesn't mean anything". Colloquially, rhesus monkeys are also called "rhesus monkeys."
A new analysis of the rhesus monkey genome, conducted by an international consortium of more than 170 scientists, also shows that humans and macaque monkeys share about 93% of their DNA.
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Most hills are "B. Not steep", since for it to be a hill it needs to be somewhere in between the elevation of flat land and mountainous land, which of course is much higher and usually steeper.
Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543. This model positioned the Sun at the center of the Universe, motionless, with Earth and the other planets orbiting around it in circular paths, modified by epicycles, and at uniform speeds. The Copernican model displaced the geocentric model of Ptolemy that had prevailed for centuries, which had placed Earth at the center of the Universe. Copernican heliocentrism is often regarded[by whom?] as the launching point to modern astronomy and the Scientific Revolution.
Heliocentric model from Nicolaus Copernicus' De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres)
Although he had circulated an outline of his own heliocentric theory to colleagues sometime before 1514, he did not decide to publish it until he was urged to do so late in his life by his pupil Rheticus. Copernicus's challenge was to present a practical alternative to the Ptolemaic model by more elegantly and accurately determining the length of a solar year while preserving the metaphysical implications of a mathematically ordered cosmos. Thus, his heliocentric model retained several of the Ptolemaic elements, causing inaccuracies such as the planets' circular orbits, epicycles, and uniform speeds,[1] while at the same time introducing such innovative ideas as:-
The Earth is one of several planets revolving around a stationary sun in a determined order.
The Earth has three motions: daily rotation, annual revolution, and annual tilting of its axis.
Retrograde motion of the planets is explained by the Earth's motion.
The distance from the Earth to the Sun is small compared to the distance from the Sun to the stars.
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<span>They provide easy access to a variety of goods and services.</span>
