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ID: #46770
Domestication
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Of the more than 4,000 species of mammals that have inhabited our earth over the past 10,000 years, the horse is one of fewer than a dozen which have been successfully domesticated. Domestication is not simply a of human intention. If it were, it is possible that we would now be sitting in our fireside chairs with a hyena curled at our feet. Much of what we take for as useful in the modern horse - speed, size and intelligence, for example - can be explained through the evolutionary changes it has in response to a changing diet. As the Ice Age advanced and forests died away, to be replaced by windswept savannah, many herbivores were to change their diets from leaves to grass. The little leaf-browsing predecessor of our modern horse - the ur-horse - began to change and adapt to a new ecological niche on the plains. The head longer, with the eye positioned at some distance from the mouth, so that in exposed spaces it could keep a careful for predators while it grazed. A larger brain began to develop, probably because, as a grazer, it needed greater tactile sensitivity in its lips to choose its food.
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