.... roles of human and natural changes in the climate of past centuries, according to Mann. Scientists were particularly interested in natural "forcings" -- factors that can affect the climate significantly but which are not part of the climate system itself. Based on statistical comparisons of reconstructed northern hemisphere temperatures, the best estimates indicate that natural changes in the brightness of the sun and volcanic emissions both played an important role in governing climate variations over the period studied. But over the past few decades, greenhouse gases produced by human activities appear to have had an increasing influence on temper .....

.... and weigh as much as 26 pounds (12 kg). The hare is also noted for its ability to change its fur color gradually to blend into its surroundings. The arctic hare's fur turns completely white during the winter months. During the spring, as the snow melts, the hare grows a new coat of brown fur. Another hare that changes color is commonly called the snowshoe rabbit. The hare has strong hind legs that enable it to hop 43 miles per hour (69 km/h), as fast as a race horse. Lagomorphs must be able to hop about quickly to escape from predators. Another lagomorph, the pika, dwells among the craggy mountain slopes of Asia and North America. In late summer the .....

.... is extremely malleable and can be worked into amazingly fine detail. This is highly desirable for some types of fine filigree work and also means that a ring made out of 24 K gold can be easily opened and closed without special tools and without growing brittle and/or breaking as is the case with most harder alloys. The disadvantages are clear. The price is high and in its pure form it's so soft it wears quickly from the purely mechanic rubbing of your skin and of other jewellery. The common solution, however, is not without its flaws. "Cutting" the gold with cheaper metals can mean dramatic savings in material cost and highly improved resistance to .....

.... in check, as well as keeping these populations strong and genetically viable by preying on the weak and sick. Both the idealized wolf and the demonic wolf are creations of the human mind. It is not easy to transcend the image of the Big Bad Wolf that has filled our myths and legends, but if we know only this wolf we do not truly know the wolf at all. And what we do not know, we fear. Our fear is perhaps the greatest threat to the survival of the wolf, for it causes us to react rather than act, to repel rather than respect. But this fear and hatred did not always separate man and beast Man the hunter once looked on the wolf the hunter wit .....

.... purpose of this paper is to discuss the issue of secure payment. In so doing, I will explore how secure is secure. Commerce on the internet consists mainly of passing credit card numbers and expiry date information electronically between the merchant and the customers. When commerce is conducted over the internet, a network is open to milions of potentially prying eyes. Moreover, there is no one to verify the validity of the credit card. To ensure that the person using the card is actually the card holder. The buyer might have exceeded the limit or can be using a stolen card. Likewise, the buyer has no assurance that the vendor on the other end is w .....

.... the Chinese mark of wang or king on the forehead. Most have an orange coat with dark brown or black stripes accented with white. that live in cold climates (Siberian ) have thicker fur than that live in warm climates. A tiger's tail is 3 to 4 feet long, about half as long as its body. use their tails for balance when they run through fast turns. They also use their tails to communicate with other . 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 .....

.... a course of about 100 years. Recent studies and estimates conclude that around two percent of the world's rainforests is lost each year. Unless we change this amount of deforestation, there will be little of our rainforests left in 50 years. Our rainforests are an integral part in our world's ecosystem, and therefore need to be conserved as best we can. The rainforests provide safety and life to millions of kinds of life, they may contain cures to many of the world's diseases, and they provide over 60 percent of the world's supply oxygen to humans and other animals. Destroying these beautiful and key parts of the world would be catastrophic to .....

.... brought about by an incident in a person's life. An example of this is if someone close to them dies. The other kind is called bipolar or manic depressive illness, it is recognized by alternating depressed and manic episodes. This is an actual brain disfunction. In the major depression or the depressed phase of bipolar illness, a depressed mood predominates, even though the patient may not be aware of feeling sad. Typically, he or she loses all interest in activities. Symptoms include sleep disturbances, not able to concentrate or to make decisions, loss of appetite or greatly increased appetite, slowed thinking and decreased energy feelings of .....

.... Computer simulations of landscapes provide useful models for gaining new insights into the coexistence of species. Although many ecologists have found fractal geometry to be an extremely useful tool, not all concur. With all the new insights gained through the appropriate application of fractal geometry to natural sciences, it is clear that fractal geometry a useful and valid tool. New insight into the natural world is just one of the results of the increasing popularity and use of fractal geometry in the last decade. What are fractals and what are they good for? Scientists in a variety of disciplines have been trying to answer this question f .....

.... explain them. Until recent times, science has not had a complete understanding of how earthquakes are caused, and what can be done to predict when they will strike. This essay will discuss how earthquakes are formed and occur, how scientists can more accurately predict the arrival of earthquakes. Before contemplating how earthquakes might possibly be prevented, it is essential that the process and formation of and earthquake be understood. Earthquakes are caused when the earth's crustal plates move, rub, or push against each other. The earth's crust (the outer layer of the earth) is made up of seven major plates and approximately thirtee .....