To give your healthcare provider important information about the current status of your metabolism, including the health of your kidneys and liver as well as electrolyte and acid/base balance and levels of blood glucose and blood proteins; to monitor known conditions, such as hypertension, and to monitor the use of medications to check for any ...
Ancient Greeks. In 2008, researchers said a reference to a total eclipse was found in Homer's Odyssey, with the lines The sun has perished out of heaven, and an evil mist has overspread the world. The Ancient Greeks believed a total eclipse to be a bad omen.
Models of the solar system. In ancient times, it was pretty obvious that the Moon went around the Earth. This was obvious partly because it was and is true. The ancients also noticed the Sun moving around the Earth -- a perfectly reasonable explanation of its apparent motion, and the simplest one available.