This is a list is of the main nuclear explosions which have happened. As well as the atomic bombings of Hiroshima and Nagasaki, the first nuclear test of a given weapon type for a country is included, and tests which were otherwise notable (such as the largest test ever). All yields (explosive power) are given in their estimated energy equivalents in kilotons of TNT.
Over 500 atmospheric nuclear weapons tests were done at various sites around the world from 1945 to 1980. As public awareness and concern grew over the possible health hazards associated with exposure to nuclear fallout, various studies were done. A Centers for Disease Control and Prevention study says that nuclear fallout might have led to 11,000 excess deaths, most caused by thyroid cancer linked to exposure to iodine-131.
Notable individuals who have been associated with nuclear weapons and related issues include:
Chojnów
Chojnów is small city in Poland. As of the year 2000, 14,900 people live in the city. The city is on the river Skora. The city belongs to the county Legnica. It is in the Lower Silesian Voivodeship. The average height of the city is 170 meters above sea level.
Chojnów is first mentioned in a note dated 1272 as a Haynow settlement. In 1288 it's called city (civitas) in documents of Prince of Legnica Henryk V Gruby. In 1333 in gained the status of a city (civitas).
Every year in first days of June, Days of Chojnów (Dni Chojnowa) are celebrated. The Whole-Poland bike race Masters has been organized in Chojnów once a year for the past few years.
Chojnów is an industrial and agricultural city. Among products produced in Chojnów are: paperware, agricultural machinery, chains, metal furniture for hospitals, equipment for the meat industry, beer, wine, leather clothing, clothing for infants, children and adults.
The most interesting monuments of Chojnów are prince of Legnica's castle from the 13th century (currently used as a museum), two old churches, Baszta Tkaczy (Weavers' Tower) and preserved fragments of city walls.
The biggest green area in Chojnów is small forest Park Piastowski (Piast's Park), named after Piast dynasty as part of Communist anti-German propaganda.
Wild animals that live around Chojnów are roe-deers, foxes, rabbits and wild domestic animals, especially cats.
Comics
In Comics, stories or information are given using pictures, or pictures and words together. In comics, a story is told with many pictures, mostly in panels. The first panel is supposed to be read first, and takes place earlier in time than the panels that follow it.
There are many kinds of comics. Comic strips are short comics which are often found in newspapers. Comic books are thin comics magazines. Graphic novels are books of comics. In Japan, comics are very popular, and Japanese comics are popular around the world. The Japanese word for comics is manga, and people use this word for Japanese comics in English and other languages.
The first comic strips in the United States were funny. "Comic" is another word for "funny", so they were called "comic strips". The first comic books were collections of comic strips. Today, many comics are serious, but they are still called "comics".
In comics, speech is usually shown through word balloons. There are many different kinds of word balloons, such as the "speech balloon", the "thought balloon" and the "scream balloon".
Diamond
A diamond (from the ancient Greek αδάμας – adámas "unbreakable") is a re-arrangement of carbon atoms (those are called allotropes).
Diamonds have the highest hardness of any bulk (all one type) material. Because of this, many important industries use diamonds as tools for cutting and polishing things. Many of them are clear, but some of them have colors, like yellow, red, blue, green and pink. Diamonds of a different color are called "fancies".
Big diamonds are very rare, and are worth a lot of money. Only 20% of diamonds are fit for jewellery. The other 80% are of lower quality. Those lower quality diamonds are called industrial diamonds, and are used to make things like drill bits and diamond saws. Even if a diamond is not of gem quality, it still has a value because It is very hard.
Cut and faceted diamonds can be attractive hence their use in jewellery. Diamonds are very effective electrical insulators, but also very good conductors of heat. On Mohs scale of mineral hardness, diamonds are scored as 10 (the highest score possible).
There are natural and synthetic diamonds. The Earth makes natural diamonds, and people make synthetic diamonds. Diamonds are the hardest natural substance known to man. Diamonds are made of pure carbon, the same chemical element as graphite, fullerene, and coal. But diamonds are very hard and in crystalline form. It is commonly believed that diamonds are formed from coal, but this is not true.
Diamonds are made deep in the Earth where there is an intense amount of pressure and heat. The formation of natural diamonds needs specific conditions. These are exposure of carbon-bearing materials to high pressure, between 45 and 60 kilobars (4.5 and 6 GPa), but at a comparatively low temperature, between about . These conditions are found in two places on Earth: in the lithospheric mantle below relatively stable continental plates, and at the site of a meteorite strike.
People find diamonds where volcanoes were a long time ago. They sometimes find tiny ones at the site of a meteorite strike. Sometimes people find diamonds on the top of the ground. But in places like South Africa, they must dig deep down into a diamond mine to get diamonds. Diamonds were first found in India.
Small synthetic diamonds are made for abrasives. Large synthetic ones are even more expensive to make than to find and dig up, so people don't make large synthetic diamonds.
For many decades the trading of diamonds was controlled by the De Beers group of companies, who controlled most of Africa's rich diamond mines. However, in the late 1980s and early 1990s, new diamond mines opened in Canada and Australia that De Beers wasn't able to control. When the USSR collapsed in 1991, many cheap Russian diamonds entered the market, overwhelming De Beers and their efforts to control it. De Beers still runs most of Africa's diamond mines, but their mines now only produce about one third of the world's diamonds.
Thanksgiving
Thanksgiving is a holiday in the United States and Canada when people give thanks. In the United States, it is on the fourth Thursday of November. In Canada, it is on the second Monday of October.
In 1863, Abraham Lincoln said the last Thursday of November would be a national Day of Thanksgiving for the United States. American immigrants brought the customs and practices of the American Thanksgiving to Canada, beginning on April 5, 1872. The United States Congress permanently made the fourth Thursday of each November as a national holiday in the year 1941. In 1957, Canada made the second Monday of each October a national holiday. Thanksgiving was first celebrated to give thanks for the harvest.
The event that Americans commonly call the "First Thanksgiving" was celebrated by the Pilgrims after their first feast in the New World in October 1621. This feast lasted three days. Edward Winslow, who was there, said that 90 Native Americans and 53 Pilgrims were there. More people in the United States celebrate Thanksgiving than Christmas and New Year. Americans eat 46 million turkeys or more each Thanksgiving.
Nobel Prize