.... mineral and the size of the deposit. We want to make sure the mineral is high grade and large enough to repay the investment and make profit. Of the many mineral found, there is only a few mineral will appear to have good potential. So it must be tested widely, which costs a lot of time and speed is one of the critical factors. If the construction is financed by loans, it leads up to high interest costs. The economics of a mine depends upon ore reserves, grade, type of ore, and the location. In order to mine, many months and millions of dollars have to spend in construction. There are only a few mines are discovered in convenient places, this costs a lot .....

.... medicine was projected into the future. The man of medicine who served in the Civil War was, whether he liked it or not, first and foremost a surgeon and always referred to as such. Though his first knife may well have been government issued, he learned the tricks of the trade in due course and sometimes became quite an expert. “Do your best” was the general idea, and most surgeons did, or at least tried. Nearly all the older doctors had received their education on an apprenticeship basis but the younger men, those who made up the bulk of the army surgeons, usually held a medical school diploma along with an office internship. Little attention was paid to .....

.... as fundamental as deny Internet service. Preventing unauthorized access is a cost that should be factored into every Internet equation. What follows is an explanation of Internet security and the concept of Firewalls. What Makes the Internet Vulnerable? Let's look at some of the most common security threats: Impersonating a User or System - To authenticate Internet users, a system of user-Ids and passwords is used. Anyone intent on gaining access to the Internet can repeatedly make guesses until the right combination is found, a simple but time consuming process made all the easier by programs which systematically try all character combinations until the corre .....

.... that was sick and they were trying to help her. They heard something on the scanner and they had to come back their small marine institute off the coast of Connecticut. They marked their spot with a buoy and went about their way. That same day two fisherman were fishing and found the buoy that had the marine institute logo on it so they decided to take a dive. They ended up diving right down to the steel boxes that contained the "White Sharks". The men were curious and so they opened the box. Nothing happened at first and then glowing eyes caught their attention. One guy was killed. The other guy managed to get away and swim for about 200 yard .....

.... is simply the next evolutionary step from CD-ROM. DVD-ROMs look like CDs, but they hold far more information, anywhere from 4.7GB to 17GB, compared with a CD's 650MB. But DVD is more than just higher capacity, which is partly why things get so complicated. DVD is a critical element of PC/TV convergence, since it's a way to distribute movies with extended features such as user-selectable camera angles and multiple language support. Also, like CD's, there are writeable and rewriteable variations coming. DVD is just starting to make a significant impact on the market. Estimates vary from about 600,000 to 1,000,000 console players ("living room" boxes used st .....

.... determining X and Y chromosomes. "What we're trying to decide now is whether to isolate probes for the other chromosomes, or whether we should utilize the eight we have," he says. Dr. Willard is currently negotiating with an American company to develop prenatal diagnostic tests, which, because the current tests are time consuming and technically difficult to do, are restricted to women over 35 and those who have a family history of chromosomal abnormalities. Prenatal tests using Willard's probes would be much simpler and faster to perform and could be available to all pregnant women who wish to take advantage of the technology. Current prenatal tes .....

.... to reproduce and spread. At this time, according to isotope dating, the world was averaging 4 times warmer than it now is. As time went on, the small mammal had spread throughout Eurasia. All of Eurasia then was covered in tropical forests. Primates evolved in what is now the Indian Subcontinent. From their placement in India, then still lowland, primates spread throughout the world once more. Some returned to North America, only to be wiped out by rodents already living there. Others spread to Europe and the Middle East. By this time, Africa had just split from marsupial overrun Gondwanaland. About a million years later it reached the Middle East, an .....

.... is generated by the oceans and carbondioxide absorbed. The oceans contain tons of microscopic plants, or phytoplankton which lives on carbondioxide dissolved in the seawater. Oceans absorb up to 2 billion tons of carbon dioxide a year, making the sea one of the Earth's key defenses against global warming. Oceans have a great potential for heat storage, the top two or three meters hold as much heat as the entire atmosphere. This warmth is continuously redistributed by surface and convection currents. Without the ocean there would be no life on land. Most of Earth's living space, is ocean, about 97%. And also 97% of Earth's water is ocean. There is a greate .....