Mighty cities like Tikal were abandoned and Maya stonemasons stopped making temples and stelae. The dates are not in doubt: deciphered glyphs at several sites indicate a thriving culture in the ninth century A.D., but the record goes eerily silent after the last recorded date on a Maya stela, 904 A.D. There are many theories as to what happened to the Maya, but little consensus among experts. There are many theories why the Mayan civilization disappeared.
PCA offered no public statements about its product recall until January 13, 2009, months after salmonellosis cases had been found to be a result of their company’s practices. Their unprofessional practices continued to lead to a large-scale organizational communication failure as the public rose to confusion by not having any information. Hallman and Cuite (2010) stated, “Confusion can arise when consumers have too little information about contaminated products”. They explained that if consumers “cannot successfully distinguish affected from unaffected products, they are likely to either under-react by assuming that they do not own any of the recalled products or over-react by discarding or avoiding the purchase of anything that resembles it”. PCA’s lacks of adequate responsibility for their wrong doings lead to ethical dilemmas and communication failure.
There are three main factors to consider when assessing the management of a tectonic event: prediction, preparation, and response. Earthquakes are very difficult to predict. However, just two years earlier, a report by US geologists concluded that an earthquake of minimum magnitude 7.0 would strike Haiti. The problem was that due to the imprecise nature of earthquake prediction, they could only narrow down the time scale to being within 30 years. The preparation in Haiti, however, was non-existent.
Or even perhaps the river did not exist in the prehistory time, it did not appeared until one hundred years ago, after days with flood. Without provide such evidence, the author could not drawed the underlying conclusion that villiges could not pass the Brim River.
The Pilgrims did not happen upon Plymouth Rock. It was a calculated landing based on information of a “wonderful plague” that wiped out the natives of that land. (page 394) Loewen also points out that this area had already been settled by the natives and the people that arrived in Plymouth Rock simply took over a previously occupied settlement. (page 394) This is not one of the best times in United States history, but it was far from the last time an event occurred that was not readily taught in high school
Nor was it a jog through town. A condition that may not be widely recognized as a health concern is just what had caused the death of twenty eight year old Cynthia Lucero. Hyponatremic encephalopathy may be a condition not as well known among people. However, that was not the case for Cynthia Lucero; it was the condition that had her dead. According to Stephen Smith, hyponatremic encephalopathy is due to a critical imbalance of sodium which causes the brain to become swollen.
(Wikipedia, 2012). The second theory is that the overpopulation caused deforestation (Tom Sever, NASA Archeologist) and then a drought made it hard to sustain life. The second theory has more evidence to support the theory, in fact decades of research has shown that “the Maya had completely transformed the land they lived by turning jungles into vast area of plains, filled with cities, farms and an ever growing
By User:Vmenkov (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0-2.5-2.0-1.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons All artificial desalination processes are based on the natural hydrologic cycle. For the most part, the energy requirements to desalinate seawater are heavy, making the process expensive. Still, it is estimated that 30 percent of the world’s irrigated areas suffer from salinity problems that prevent crops from flourishing as they would if freshwater were available. The need for desalinated water for human and crop consumption is critical in the Middle East and other regions where freshwater is not abundant. Distillation The most fundamental form of desalination is distillation, one of the earliest forms of water treatment.
Normal rainwater can sometimes be as low as a pH level of 5.0. The issue comes in that the levels in the area of the Adirondack Mountains have levels most commonly between 4.0 and 4.8, sometimes as low as 2.1. Levels this low put aquatic life in sever danger or wipe out all life completely. This was first noticed in the 1800’s. A geologist noticed the gravestones in New York were becoming impossible to read.
Dr. Ricardo Alegria, the father of modern Puerto Rican archaeology, had stressed the lack of evidence for direct Mesoamerica-Taino contacts, indicating that similarities in words, practices and tools/artifacts can be explained as contacts that occurred after the Spanish conquest, or to information that was passed across land trade routes from nation to nation until it arrived , 3rd hand, to the Taino or Mesoamericans. Also, to date, there hasn't been found a single Mesoamerican artifact (potsherd, stone carving, etc.) in a pre-Columbian setting anywhere in the Greater Antilles. However, in the last 20 years several archaeological finds have hinted at the possibility of direct, overseas trade between the Taino and Mesoamericans (Yucatec Maya): finds of Ecuadorian & Colombian made jewelry in Vieques (small island to