.... (Siberian tigers) have thicker fur than tigers that live in warm climates. A tiger's tail is 3 to 4 feet long, about half as long as its body. Tigers use their tails for balance when they run through fast turns. They also use their tails to communicate with other tigers. Where did tigers come from? Tigers (and all other carnivores) are descended from civet-like animals called miacids that lived during the age of the dinosaurs about 60 million years ago. These small mammals, with long bodies and short flexible limbs, evolved over millions of years into several hundred .....

.... further insight into how immunity works. The most basic requirement of an immune system is to distinguish between one's own cells and "non-self" cells. The second job is to eliminate the non- self cells. When a foreign object enters the body, several things happen. Blood stops flowing, the immunity system begins to eliminate unwanted microbes with phagocytic white blood cells. This defensive mechanism is possessed by all animals with an innate system of immunity. Innate cellular immunity is believed to be the earliest form of immunity. Another form of innate immunity is .....

.... Massachusetts Institute of Technology. The CSM was made of two parts. The crew stayed in the Command Module, which had some couches and was pressurized with oxygen. Behind the CM was the SM or Service Module which had the main engine, which had 21,500lb. of thrust. The reaction control system , oxygen, fuel cells, hydrogen tanks, and envirnmental control systems. The main engine was only used for changes in course and changes in orbit and escape from the lunor orbit. When the crew came back for reentry the CSM would split. The Command Module had heat sheilding so it wou .....

.... in 3-D. You can look around objects, too -if the apple is blocking the view of an orange behind it, you can just move your head to one side. The apple seems to "move" out of the way so you can see the orange or even the back of the apple. If that seems a bit obvious, just try looking behind something in a regular photograph! You can't, because the photograph can't reproduce the infinitely complicated waves of light reflected by objects; the lens of a camera can only focus those waves into a flat, 2-D image. But a hologram can capture a 3-D image so lifelike that you can look .....

.... would move around by walking, running, or in a big pack with it’s family. The pack can have as much as 36 wolves. Each pack always has two head leaders, one male and the other female. The pack may hunt and go as far as 130 to 13,000 sq. km.(50 to5,000 sq. miles)—and will defend all that land from intruders. The wolf would have soft fur over it body to cover it like a jacket to keep it warm during the winter. The wolf’s eyes are very keen. It can see and hear very well when hunting for the prey. When you hear a wolf howl it is not to scare you. It can be used for many diff .....

.... is easier to control the plant growing environment. Some others are restricted supply of suitable water, lack of suitable soil, high labor cost of traditional cultivation, high cost of sterilizing soil, and there is a greater reliability and predictability of plant production. In addition, It's easy! Depending on what is being grown, most of the time hydroponic plants require less attention than soil-grown crops. Because of this, it can relieve some people of the added responsibility that soil-grown plants require. As one can see, there are many advantages to this system .....

.... submerged in cool water for a long period of time. There are even reported cases of elderly people dying of in their homes do to the non-efficient heating system. Over 50% of deaths in Manitoba, Alberta, and British Columbia are related to alcohol and drug intoxication.(Seluge,1) can also occur when a person has illnesses or health problems such as heart circulatory, or thyroid diseases; diabetes, arthritis, and other conditions that prohibit mobility. Having these conditions can interfere with the body's ability to fight the cold. When a person is fatigue or in poor phy .....

.... that contain less than 100 individuals, but in large populations drift may have no significant effect on the population. Another mechanism is gene flow which is when a population may gain or lose alleles by the migration of fertile individuals between populations. This may cause the allele frequencies in a gene pool to change and allow the organism to evolve. The most obvious mechanism would have to be mutation that arises in the gene pool of a population or individual. It is also the original source of the genetic variation that serves as raw material for natural selection. .....