Human immunodeficiency virus, better known as simply HIV, is a virus that causes acquired immunodeficiency syndrome (AIDS). AIDS is a serious condition that leads to a failure of the immune system. It was discovered in 1981 and since this time HIV infections have spread to pandemic proportions. It is estimated to affect about 0.6% of the entire population of Earth and causes about 2 million deaths per year. There is no cure for HIV, but the most widely used treatment is antiretroviral drugs which increases the life expectancy of people suffering from this disease. Continue reading to find out how HIV is transmitted between people.
Perfume is a pleasant smelling fragrant liquid that is, most commonly, applied to the human body. It is designed to mask unpleasant odors and provide a long lasting pleasant scent. They have been used since the earliest civilizations, but the perfume we know today was invented a few hundred years ago. Perfume is used by both men and women, but men’s perfume is usually referred to as cologne. Let’s take a look at how perfume is made.
If you have ever watched American football before you may have heard the term Hail Mary pass. It is used to describe a very long pass, that has little chance of success, used out of desperation. It is most commonly used with little time remaining in the game in an effort to quickly score a touchdown or get field position for a last ditch field goal. Continue reading if you want to find out where this term comes from.
Vitamin D is a group of 5 fat soluble vitamins, with D2 D3 the most common forms. Vitamin D is truly unique because it can be synthesized in the body with adequate exposure to the sun. It is also obtained from foods such as fatty fish, egg and liver. However, many staple foods, such as bread and cereal, are now fortified with additional vitamin d. Let’s take a look at why this vitamin is so important for our health.
Aluminum, also written as aluminium, is a lightweight silvery-white metal. It has an atomic number of 13 and its chemical symbol is Al. Although it is the most abundant metal on Earth, it is too chemically reactive to occur on its own. It can be found combined with other elements in many different forms. The most important source of aluminum is bauxite, which is mined for the aluminum content. Aluminum is also known for its many isotopes and their uses. Let’s take a closer look at the isotopes of aluminum.
Crayons are a instrument used for coloring, drawing or writing. They are popular for use with young children because they are cheap, non-toxic, not messy, and easy to use. The type of crayons most common today were not invented until the 19th century. There are many different manufacturers of crayons today, but the most famous is the Crayola company. Let’s take a look at how crayons are made.
Bill Nighy is a famous British actor who became known to a worldwide audience in 2003 with a strong performance in the popular movie “Love Actually.” Before this “breakthrough” role he was well known in British television and cinema, where he started working in 1976. He has now passed 60 years of age, but he still has many upcoming projects and doesn’t look like slowing down any time soon. The following is a list of movies that Bill Nighy has acted in during his career so far.
Geckos make up the largest family of lizards in the world. There are over 2000 known species of geckos and many more are thought to exist. They are unique amongst lizards because they make chirping sounds when interacting with other geckos. Another unique feature is the adhesion ability of their footpads. This allows them to stick to most surfaces without a sticky liquid. If you have ever wanted to know what these interesting creatures eat, continue reading to find out.
Hoover dam is a massive concrete dam located on the border between Arizona and Nevada in the United States. The dam was constructed in the Black Canyon of the Colorado River and the water it holds back forms Lake Mead. This water source is used as a water supply, for irrigation and for hydroelectric power generation. If you have ever wanted to know who built Hoover Dam, keep reading to find out.
Rhenium is a metal with an atomic number of 75 and is represented by the chemical symbol Re. It was first discovered in 1925. It is one of the rarest naturally occurring elements in the world. It also has one of the highest melting points of any element. This attribute is one of the main reasons that rhenium is an important element in many industries.