In the Sumerian city, the Ziggurat of Ur was a skyscraper over the city. It was about 20 metres (66 feet) tall. The only level that remains today is the bottom. There were big staircases to get up and down. They tell a lot about the people who built them. Sumerians had no tools and machinery like us. They were careful brick builders. Brickmakers formed mud bricks that were perfect. After drying they took them to the site and set them in place with bitumen. Bitumen is a thick sticky black stuff. It's like asphalt, the stuff they use to pave roads. They braided reeds so they would be stronger, and hooked them up like steel cables. Later the Ziggurat became more than a place for gods. There were workshops for craftworkers. For the priests, there were temples to do worship.
Ur had three social classes. The richer, like government officials, priests, and soldiers, were at the top. The second level was for merchants, teachers, laborers, farmers and craftmakers. The bottom were for slaves captured in battle. Burials at Ur give insight into people's social standing. Kings and queens were buried with treasure. Since irrigation gave Ur abundant crops, not everybody needed to work on farms. People learned other skills. Sir Leonard Woolley found a tablet that listed Ur's special workers. The chisel workers made sculptures, the gem cutters made gems, and the fullers stomped on woven wools to make them soft. The metal workers made weapons.
Odenwald
The Odenwald is a mountain chain in the south of Hesse, in the north of Bavaria and the north of Baden-Württemberg.
In the south of the Odenwald there is the Neckar River. In the east there is the Main River . In the west there is the valley of the Rhine River. The highest mountain is the Katzenbuckel (literally "cat's hump", 626 m).
The big cities Mannheim and Frankfurt am Main are near to the Odenwald. People of these cities like to go there at holidays. It is known for its clean thin air. There are many marked hiking paths. You can find wild blueberries, strawberries and mushrooms in the forests.
Several small towns are very beautiful like Weinheim on the Bergstraße and Michelstadt. The mild climate of the area is well known.
Sviatoslav I, Prince of Kiev
Sviatoslav I was an early ruler of the Kievan Rus', a nation that evolved into modern Ukraine. He was the son of Igor I of Kiev and Olga of Kiev. He ruled from 962 until 972. During his reign he destroyed the Khazar Empire and for a short time conquered what is now Bulgaria.
List of citrus fruits
Citrus is a common term and genus of flowering plants in the family Rutaceae. It originated in tropical and subtropical southeast Asia. The name comes from the citron.
Citrus fruits usually have a sour taste but farmers grow more of the sweet ones. There are many types of citrus fruits in the world.
Daylight Saving Time
Daylight Saving Time (DST) or Summer Time (ST) is a time to timekeep during summer. During the summer months, the sun stays visible for a longer time, and sunset happens late in the day. For this reason, certain countries advance the time by one hour near the start of summer, and put it back one hour during autumn.
DST helps stores that sell to people after they get off work, and it doesn't hurt farmers and others whose hours are set by the sun. It cuts traffic accident rates. Sometimes it can reduce energy costs, but it can also increase them.
Most of the world's countries do not use DST, but it is common in Europe and North America.
The United States, Australia, the United Kingdom, Canada and many other countries have DST. These countries also have regions that do not have DST:
Iceland, Russia, some parts of Ukraine and Belarus are countries in Europe without DST.
Since 1971 all clocks in the European Union, of which the UK is a member state, have changed on same dates and at the same time, 06:00 GMT.
== Automatic adjustment Some computers connected to the Internet will automatically adjust their clocks for DST. Most newer computers will not adjust or will adjust the time incorrectly or on the wrong date. Also, computers with more than one operating system may be incorrectly adjusted twice or more when each operating system boots.
Lanthanum
Lanthanum is a chemical element. It has the chemical symbol La. It has the atomic number 57. It is part of a group of chemical elements in the periodic table named the Lanthanides. It is a rare earth element. It is silvery white, malleable and ductile. It is soft and can be cut with a knife.
Rowing
Rowing is about moving a boat on water using human muscle power. It can be a sport. The goal in rowing is to move as fast as possible on top of the water. The athletes use a boat. They move the boat forward by using two sculls or one oar. There are different types of rowing. The types depend on how many people are in the boat and if they have a coxswain or not. Rowing is a very popular sport in England, the Commonwealth, and the Northeastern United States. The old universities of the United States and England have yearly rowing matches.
Inkjet printer
An Inkjet printer is a printer for computers. It uses special ink to print on the paper. Another type of printing technology is the Laser printer. Inkjet printers are preferred for printing photos and graphics due to their high-quality color output, whereas laser printers are preferred for printing text due to their high contrast and speed.
Usually, inkjet printers are used by people who print very little. The ink comes in special ink cartridges, which can be very expensive and uneconomical. Also, the ink in the cartridge may dry up. This means that a new cartridge is needed. Three colors of cartridges, which combine magenta, yellow and cyan inks are used to create color tones. A black cartridge is also used for crisp monochrome output. Some professional printers have one or more additional colors for better photo quality, such as light cyan, light magenta, blue, red, green, orange, and grey.
Inkjet printers may use either dye or pigment inks. Pigment inks are less likely to fade, whereas dye inks create more-realistic photos and are less likely to clog the printhead.
Many professionals use inkjet printers to print on very large surfaces (up to 5m width). These printers usually do not use cartridges, but have a continuous supply of ink that could last for a long time. Standard-size (A4 or US Letter) printers with a continuous ink supply are also available.
Inkjet printers need special paper. This paper has been treated so that the ink does not smear.
Less expensive inkjet printers, which cost a little more than 100 US dollars, are a bargain for users who want to be able to print pages in color. Inkjet printers can be very cheap but the ink can also be rather expensive. Some professional inkjet printers can print on surfaces other than paper, such as CDs/DVDs or plastic cards.
An inkjet printer can print between 300 and 720 DPI (Dots Per Inch). Some newer printers can print at higher resolutions, although the benefit of resolutions beyond 720 DPI may not be noticed by the human eye.
A common problem with inkjet printers is that if the printhead is clogged, banding (stripes) will appear in the printed image. To fix this, the printhead needs to be cleaned using the software included with the printer. This problem occurs most often when the printer has not been used for a long time. To prevent this from happening on rarely-used printers, a cron job can be scheduled to print a purge sheet (an image containing all colors used by the printer) once per day. A small, barely noticeable (usually only noticeable by magnification) amount of banding will occur even with a perfectly clean printhead due to the way the printer works.
Laser printer