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There are approximately 10,000 living species of birds on the planet. Most birds are relatively small and lightweight and most species weigh less than 1 kg (2.2 lbs). This is partly due to the fact that these characteristics make it easier for birds to fly. However, not all birds fly and this means that the largest birds are capable of reaching a very large height and weight. Let’s find out which bird is that largest living bird in the world.
Christmas songs are songs written about and/or sung during Christmas. Many thousands of Christmas songs have been written over the years and there are literally hundreds of popular songs dedicated to this time of year. The oldest Christmas song is probably “Jesus refulsit omnium” (Jesus, Light of the Nations), which was written in 368 by Saint Hilary of Poitiers. However, Christmas songs didn’t become popular until many years later. While many old Christmas carols are still enjoyed during Christmas, there are also many modern Christmas songs that are extremely popular. Let’s find out which of these is the best selling Christmas song of all time.
During the lead up to Christmas day many western Christian churches celebrate the season of advent. The word advent means “coming” or “arrival” and it is most commonly celebrated on the first four Sundays before Christmas. It is usually starts on the Sunday closest to November 30th. Special colours used during this time include purple and blue and this is displayed within the church. During the season of advent candles are lit to show the passing of time. It is a joyous time in the church as a lead up to Christmas day or the coming of Christ.
An asteroid is defined as being a small planetary object that orbits around the Sun. Many of the asteroids in the solar system have their own orbit and spin on their own axis. Asteroids are sometimes referred to as minor planets or planetoids and are mostly located in the asteroid belt between Mars and Jupiter. Generally speaking if the rocky object in space is not a planet or a moon, it is classified as an asteroid. They can range in size from as small as a grain of sand to as large as a small moon. So what is the largest known asteroid? Read this article to find out.
Europe is the second smallest continent by area and 3rd largest continent by population. Europe has a diverse geography including a number of mountain and river systems. It is also home to a number of lakes, although most of these are considered small by world standards. Despite this, Europe is home to the 14th largest lake in the world.
Yellow fever is a mosquito borne disease caused by a virus from the Flaviviridae family, called the yellow fever virus. This virus is transmitted via female mosquitoes, especially the yellow fever mosquito called Aedes aegypti, in tropical and subtropical regions of South America and Africa. Africa is home to 90% of the cases of the disease and it is thought that it originated in this location. It is considered to be one of the most dangerous human diseases and causes fever, chills, muscle pain, headache and nausea. However, if the disease progresses to the second stage it can lead to liver damage, internal bleeding and death in 20% of cases. It is estimated that there are 200,000 cases a year and more than 30,000 deaths. Let’s find out how this potentially fatal disease is prevented and treated.
Central America is generally regarded as the region between North America and South America. It is considered to be a subcontinent, rather than being a part of either continent. There are seven countries in this region called; Panama, Nicaragua, Honduras, Guatemala, El Salvador, Costa Rica and Belize. Central America covers about 534,000 km2 (202,000 sq mi), which is just 0.1% of the Earth’s surface! Despite this fact, Central America is home to the 19th largest lake in the world (by area). Let’s find out the name of this lake and where it is located.
The gallbladder is a small organ that is located just below the liver and above the stomach. In adults it is approximately 8cm (3.1 in) long and 4 cm (1.6 in) in diameter. It is hollow and is divided into three parts, the fundus, the body and the neck. The neck is connected the biliary tree via the cystic duct. This joins to the common hepatic duct which becomes the common bile duct. The gallbladder is also connected to the duodenum.
Africa is the second largest continent on Earth in terms of both area and population. It is located to the south of Europe and to the south-west of Asia and the Middle East. Africa is home to many large freshwater lakes and it is from one of these lakes that the primary source of the largest river in the continent is found. This river is not only the longest in the world, but also supported one of the most famous Ancient civilizations. Let’s find out which river is the longest in Africa.
A national park is an area of land reserved for conservation purposes. National parks are usually created in areas of natural habitat that hasn’t been adversely affected by human development. The aim of this is to protect these environments, and their delicate ecosystems, while still allowing people to visit these areas to enjoy their beauty. Each country has control over their national parks and there are many differences in how these are created and governed. Because each country has a different system, the International Union for Conservation of Nature (IUCN) has developed a set of requirements for defining National Parks that meet their definition. Let’s find out which national park is the largest in the world.