Slug is a general term for a gastropod mollusc which has no shell, or just a small internal shell.
Slugs belong to several different families which also include snails with shells. Snails are gastropods with a coiled shell large enough for the animal to pull back inside. The families of land slugs are not very closely related, despite looking similar. The shell-less slug type is an example of convergent evolution, and so the category "slug" is not a taxonomic category.
The name "slug" is used for air-breathing land slugs, while the marine forms are usually known as sea slugs. Land gastropods with a shell that is too small to hide the body are sometimes called "semislugs".
Like land snails, most slugs have four 'feelers' or "tentacles" on their head. The upper two (the "optical tentacles") see light and have eyespots at the ends, while the lower two (the "sensory tentacles") are used for smelling. The tentacles are retractable, and can regrow if lost.
On top of the slug, behind the head, is a body part called the "mantle," and under this are the genital opening and anus. On one side (almost always the right side) of the mantle is a breathing hole, which is easy to see when open, but difficult to see when closed. Inside the mantle in some species is a very small, flat shell.
The bottom of a snail is called a "foot". Like other snails, a slug moves by rhythmic waves of muscle contraction on the bottom of its foot. At the same time, it secretes a layer of mucus on which it travels, which helps prevent damage to the foot. Around the edge of the foot is the 'foot fringe'.
Some slug species hibernate underground during the winter in places with cold winters, but in other species, the adults die in the autumn.
Ruwer
Ruwer could mean:
Ruwer (municipality)
Ruwer is a municipality (a convention community called "Verbandsgemeinde" Ruwer) on the River Ruwer. The administrative offices are in the town of Waldrach, and it should not be confused with the nearby town of Ruwer, which is for administrative purposes a part of the city of Trier.
Gunpowder
Gunpowder (or gun powder) is a mix of chemical substances (75% saltpeter, 15% charcoal and 10% sulfur). It is used primarily in firearms, burns very quickly, and creates gases. Those gases use up more space than the gunpowder they come from, so they push outward. If the gunpowder is in a small space, the gases will push on the walls of the space, building up pressure. In a gun, the pressure pushes against a bullet, causing it to fly out at high speeds. If the pressure became too high, it could destroy the gun barrel.
Gunpowder was invented by the Chinese. The first references of black powder, the original form of gunpowder, date to the 9th century. According to legend, Chinese alchemists were looking for a formula to create the elixir of life, or the mythical potion that causes whoever drinks it to become immortal, when they accidentally created gunpowder. Because the powder was highly flammable, or burned very easily, they decided to call it "fire medicine" (Simplified Chinese: 火药 / Traditional Chinese: 火藥). The Chinese soon weaponized the substance, or made weapons out of it. In later centuries they made many weapons using gunpowder, including rockets, bombs, flamethrowers, and land mines, before making cannons and guns. The oldest weapon that uses gunpowder dates back to a bronze handheld cannon made in northeastern China in 1288. The first mention in Europe was in the 13th century when Roger Bacon described the formula of black powder. Gunpowder was extremely valuable to the Chinese civilization, in fact so valuable that sometimes it was traded for gold.
Mayor
A mayor is a person who is in charge of the administration of a city. Some mayors are elected by the people who live in that city. For other cities, a central government body may choose the mayor. Some large cities have a Lord Mayor.
In federal countries like Germany the mayor can also be head of the government of a city state. The Mayor of Hamburg runs the government just like the Minister President of Bavaria runs the Bavarian government. In some big cities such as Tokyo the Mayor is a Governor.
In many countries, such as the United Kingdom and Australia, the mayor is not in charge of the daily functions of a city or town. That job is done by a Town Clerk or Chief Executive, who is appointed to a full-time paid job. The mayor works part-time, usually without payment, and represents the city at events and civic functions.
Churning of the Ocean
Churning of the Ocean is a mythical story of Hinduism and Hindu mythology. It is described in many Hindu scriptures, especially in the Mahabharata and the Puranas. The story tells about the churning of the ocean by the gods and the demons. From this churning of the ocean, several things came out of the ocean. Some of them were:
The Hindu scriptures and the Hindu mythology tell that all the above things came out of the ocean for the good of human beings.
Martha Washington
Martha Dandridge Custis Washington (June 2, 1731 – May 2, 1802) was the wife of George Washington, the first president of the United States. Although people only started using the term decades after her death, Martha Washington is considered to be the first First Lady of the United States.
She was born on June 2, 1731, at Chestnut Grove Plantation near Williamsburg, Virginia. Her parents were  John Dandridge, an immigrant from England, and his wife Frances Jones. Her education consisted of the womanly arts such as needlework and playing musical instruments. Later in life, she would learn to manage a plantation.
At 18, she married Daniel Parke Custis, a tobacco planter 20 years older than her. She bore him four children. Only two, John "Jacky" and Martha "Patsy", survived to young adulthood. She was widowed in 1757 at age 26. In 1759, she married George Washington, a colonel in the British Army. Their marriage was one of mutual affection and respect, but not one of passion. The Washingtons had no biological children.
During the American Revolutionary War, Martha visited the cold and starving Continental troops spending the winter at Valley Forge, Pennsylvania. She donated as much food as possible, and sewed clothing for the soldiers. She nursed those who were ill or dying. She urged local women to do the same. Her commitment to the welfare of the veterans of the Revolution would remain lifelong. They addressed her as "Lady Washington."
Washington was unanimously elected president in 1789. Martha served as First Lady from April 30, 1789 to March 4, 1797. She found the job unpleasant. She complained of the journalists who followed her everywhere (even to the circus with her grandson), and of the many restrictions placed upon her as First Lady (she was not allowed to accept dinner invitations, for example).
She set many of the customs and standards that were observed by future First Ladies. She retired to Mount Vernon with her husband after serving her country.
She died in Mount Vernon on May 22, 1802. Her obituary (death notice) was widely printed in regional newspapers. She is buried in the vault at Mount Vernon. She was the first historical female figure to be depicted by the United States government on postage stamps and currency.
Abigail Adams
Abigail Smith Adams (November 11, 1744–October 28, 1818) was the wife of John Adams, the second President of the United States. Later on, people started to address the wife of the president as the First Lady. So, she became the second First Lady of the United States. She was born in Weymouth, Massachusetts. She belonged to a famous family of Massachusetts (the Quincy Family).
In 1801, the couple retired and lived in Quincy. Abigail died in 1818, at age 74 of typhoid fever.