On-road bikes (ones that are allowed on public roads) require the rider to have a special type of driver's license to be ridden legally. Off-road bikes are not allowed to be driven on public roads.
Speed and stunts are the main goals for off-road bike sports. Many on-road bikes are much faster than off-road bikes and can be used in sports such as motorbike racing.
Motocross is a form of motorcycle racing. It is on an off-road circuit. The sport came from motorcycle trials competitions held in the United Kingdom.
1585
Guinea pig
Guinea pigs ("Cavia porcellus") are a kind of rodent. They are not pigs and are not from Guinea. They are domesticated animals which originated in the Andes.
Studies on biochemistry and hybridization suggest they are descendants of a closely related species of cavy. They do not occur naturally in the wild.
In many parts of the world, people keep them as pets. In Peru, Bolivia, and several other countries, they are raised for food. The first people who domesticated the animals, did it for food. Besides being a pet and a source of food, in some places people think guinea pigs keep bad spirits away. In Quechua, the language of some the native tribes of Peru, they are called "". The Spanish-speaking people of the region call them "cuy" (plural: "cuyes").
This perception of pigginess occurred in many languages other than English; the German word for them is "Meerschweinchen", literally "little sea pigs" (sailing ships stopping to reprovision in the New World would pick up stores of guinea pigs, which provided an easily transportable source of fresh meat), the Russian and Polish word for them is similar, "morskaya svinka" (Морская свинка) and "świnka morska" respectively, meaning also "little sea pig" (it comes from archaic use of the word to mean "overseas"). However, this perception of pigginess is not universal to all languages or cultures. For example, the common Spanish term is 'conejillo de Indias' (Indian bunny rabbit).
Guinea pigs need large open air cages in which to romp and frolic. They should have a diet of 1/8 cup of high quality grass-based guinea-pig pellets daily, as per manufacturer’s instructions. They should also have unlimited grass hay, and at least one cup of a variety of veggies. Guinea pigs like to be held in hand.
Guinea pigs should be kept in cages larger than 7.5 square feet or 10.5 square feet for 2 pigs. They should always have a friend as guinea pigs are social animals.
Breeding guinea pigs are not recommended as the rate of pregnancy complications is high.
For their diet guinea pigs generally prefer fresh fruits and vegetables.
Guinea pig is also slang for a person who is the first to try something. It can also mean the subject of an experiment. This is because guinea pigs are used by biologists as model organisms.
1531
Philip Glass
Philip Morris Glass (born January 31, 1937) is an American composer of modern music. He is one of the most influential music makers of the late 20th century.
Glass has created operas, music for quartets, dance, and much more. He is known for writing minimalist music.
Glass has described himself instead as a composer of "music with repetitive structures". Though his early music shares much with what is called "minimalist", he has since evolved stylistically.
Audioslave
Audioslave is an American rock band. The band is made up of Chris Cornell (vocals), who was with Soundgarden until 1997, and Tom Morello (guitar), Tim Commerford (electric bass) and Brad Wilk (drums), who were with Rage Against The Machine until 2000.
Their first album "Audioslave" was released in 2002 and the next one, named "Out of Exile", followed in 2005. On May 6, 2005 Audioslave became the first American rock group to play in Cuba. Because of American laws against trade with Cuba, this concert had to be allowed by US authorities.
Environment
Environment means anything that surround us. It can be living (biotic) or non-living (abiotic) things. It includes physical, chemical and other natural forces. Living things live in their environment. They constantly interact with it and adapt themselves to conditions in their environment. In the environment there are different interactions between animals, plants, soil, water, and other living and non-living things.
Since everything is part of the environment of something else, the word "environment" is used to talk about many things. People in different fields of knowledge use the word environment differently. Electromagnetic environment is radio waves and other electromagnetic radiation and magnetic fields. The environment of galaxy refers to conditions of interstellar medium.
In psychology and medicine, a person's environment is the people, physical things and places that the person lives with. The environment affects the growth and development of the person. It affects the person's behavior, body, mind and heart.
The living conditions of living organisms in an environment are affected by the weather or climate changes in the environment.
In biology and ecology, the environment is all of the natural materials and living things, If those things are natural, it is a natural environment.
Environment includes the living and nonliving things that an organism interacts with, or has an effect on it. Living elements that an organism interacts with are known as biotic elements: animals, plants, etc., abiotic elements are non living things which include air, water, sunlight etc. Studying the environment means studying the relationships among these various things. An example of interactions between non-living and living things is plants getting their minerals from the soil and making food using sunlight. Predation, an organism eating another, is an example of interaction between living things.
Some people call themselves environmentalists. They think we must protect the natural environment, to keep it safe. Things in the natural environment that we value are called natural resources. For example; fish, insects, and forests. These are renewable resources because they come back naturally when we use them. Non-renewable resources are important things in the environment that are limited for example, ores and fossil fuels after a few thousand years. Some things in the natural environment can kill people, such as lightning.
Tooth
A tooth is one of the hard, white things in the mouth. Teeth (plural) are used to help the mastication process by chewing food. "Chew" means to break up and crush food so it can be swallowed (pushed down into the stomach).
Most vertebrates have teeth. Birds are the biggest group that do not. Many invertebrates have mouthparts which, to some extent, act like teeth. Different animals have different kinds of teeth because they eat different foods. Some animals use teeth as a weapon. Human adults usually have 32 teeth. Human children usually have 20 teeth.
Some human babies are born with teeth. Natal teeth are teeth that are present at birth. These are different from neonatal teeth which are teeth that emerge during the first month of life. Natal teeth are not common. They occur in about 1 out of every 2–3 thousand births. They are usually found on the lower jaw. Natal teeth are usually not well attached and may easily wobble.
Deciduous teeth or milk teeth or temporary teeth are the first set of teeth for most mammals. Humans have 20 of them. The first teeth (called "primary teeth") start to "erupt" (come through the gums of the jaw) when a baby is about 6 months old. When these teeth erupt it can really hurt. Babies chew on things to make the pain better. This is called "teething" (verb: "to teethe"). Most children have all 20 teeth by two or three years of age.
At age 6–7 the permanent teeth start to erupt. By the age of 11–12 most children have 28 adult teeth. The last four teeth, called 'wisdom teeth' or third molars come in by age 17–21 in most people. Some people never grow wisdom teeth. Or they may have only two instead of four.