They were found 50 to 56 million years ago, and they originated in North America
Look for a historic event called Paul revere between 1497 and 1781 and you will find your answer
The one who found the pacific ocean is an Spanish explorer named <span>Vasco Núñez de Balboa. he found the pacific in in 1513</span>
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In the 19th century (before as well as after the Civil War), railroads brought many changes to the United States of America. For one thing, trade and commerce increased, with a complementary expansion of industry, especially in the North. For another, settlement of the 'wild West' was made easier, as was increased growth of areas already settled. For yet another, military operations became more sophisticated and generally more power-packed: during the Civil War, Union and Confederate forces could be quickly reinforced or moved to areas of special need due to the rapid transportation provided by railroads.
