One of the differences that is noticeable in a very comparison of viruses and bacteria could be the height and width of the microorganism. Viruses less complicated smaller than bacteria. A typical virus is between 20 and 400 nanometers, while a bacterium can be as large as 1000 nanometers. The smallest bacteria are generally visible having a light microscope, while viruses require an electron microscope for observation. The Middle Ages (also called the medieval period) was a period of time that lasted in regards to a thousand years from your 5th for the 15th centuries. It is often subdivided into three periods with all the first being the Early Middle Ages, the other defined as the High Middle Ages, and also the third and final known as the Late Middle Ages.