Morphine, like many prescription drugs, may require larger doses for pain control when used for extended periods of time. Over time, the body can develop a tolerance for the medication and will require more medication to experience the same level of effectiveness.
By Kimberly Munro Fri, Mar 18, 2011. The first installment of our Ancient Peru series relates what archaeology has revealed about its first cities and civilizations. The expansive, culturally rich civilizations that existed in the Americas at the time of European contact came as a great surprise to the early Spanish explorers. Most notable were the Aztec empire in Central Mexico and the Incan empire in Peru, both of which controlled great expanses of land and millions of people.
Like Mayan huts of today, ancient cities at Chichen ChichÃ©n itza ItzÃ¡ and Tulum in mexico were built, with, mud, limestone, stone wood. And thatch, over time wood and, thatch deteriorate pulling down pieces of the more. Sturdy stone experts often make educated guesses about how ancient cities looked based on How the maya. live todayrom roughly 500 BC to 1200 AD Mayan civilization flourished throughout Mexico and Central America. In the 1800s, explorers John Lloyd Stephens and Frederick Catherwood wrote about and illustrated the ancient Maya Architecture they saw.