.... accented with white. Tigers that live in cold climates (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 fl .....

.... In addition over the last two decades the percentage increase of CFCs in the atmosphere has been higher than any other greenhouse gas. By 1990 the increase was 4-12% a year. CFCs also destroy ozone - itself a greenhouse gas - their net effect on climate is unclear. The strength of the indirect effect of ozone depletion depends on variables such as temperature of the upper atmosphere and cannot yet be measured with any confidence. According to new research, however, it is possible that the indirect effect of CFCs cancels out some or all of the direct .....

.... and rectal sex is a common practice among gay males. For these reasons, the disease spread in the gay male population of this country immensely more quickly than in other populations. It became to be thought of as a "gay disease". Because the disease is spread primarily by exposure of ones blood to infected blood or semen, I.V. drug addicts who shared needles were soon identified as an affected group. As the AIDS epidemic began to affect increasingly large fractions of those two populations (gay males and IV drug abusers), many of the rest of this society looke .....

.... had were with incompatibility problems that plagued their entire line of CPU's until the K6. These problems hurt AMD because nobody wanted a CPU that could not run 15% of the programs out. People wanted a processor that had programs optimized specifically for it, people wanted a computer with a sticker that said "Intel Inside" because they knew every program would run on it. If people wanted a cheap solution then they went with the low-cost AMD CPU and faced incompatibility problems with a lot of programs. But most people were willing to spend the money to ge .....

.... you exercise regularly, your overall risk of a heart attack is about 50 percent less than if you are inactive and out of shape. With routine exercise you can reach a level of physical fitness comparable to an active person ten to twenty years younger. Regular exercise may also lower your cholesterol and blood pressure, and reduce the risk of diabetes. Exercise increases the size of coronary arteries and reduce clogging due to atherosclerosis. Exercise also increases the efficiency of your blood's oxygen-carrying capacity and your muscles' uptake of oxygen .....

.... a frog that is brown with two yellow stripes down its head and back and it has bright green legs. II. Habitat of the frog If you went on a tour of the world, you would find frogs on every continent except Antarctica. The family of frogs called Ranidae, include the leopard frog and the bullfrog. These frogs are found in North America, South America, Asia, Australia and Europe. The green-boned frogs and the arrow poison frogs are found only in Central and South America. On all these continents and in all these countries, frogs can be found all over the pl .....

.... to be a result of demonic possession. It was treated with exorcism, flogging and torture to drive the evil spirits from the body. It wasn't until the late 19th and early 20th centuries that physicians had a more scientific view on depression. Sigmund Freud and Josef Breuer discovered that depression is a psychological and not a demonic force or organic abnormality. Depression is caused by many factors. The loss of a loved one during childhood or other traumatic experiments (ie. abuse) can increase person's chances of developing depression .....

.... to scientific progress and is said to have been the first to conduct demonstrations with live animals--specifically pigs-a practice later extended to other species and termed "vivisection" (Loew, 1982). However, it was not until the sixteenth century that many experiments on animals began to be recorded. In 1628, William Harvey published his work on the heart and the movement of blood in animals (French, 1975). In the 18OOs, when France became one of the leading centers of experimental biology and medicine-marked by the work of such scientists as Francis Magend .....