.... in death. Another single-gene disorder is the Tay Sachs Disease. People who inherit the faulty Tay Sachs gene lack a crucial enzyme that is needed to break down fatty substances in brain and nerve cells. As a result, these substances build up in such large quantities that the central nervous system gradually stops functioning and the person dies. Symptoms usually become evident within the first six months of life, and most children die before reaching the age of four. 1 in 3,600 people of eastern European Jewish ancestry carry it. A category of single-gene disorders known as X-linked disorders involves genes .....

.... together. Because of the intricacy of the operation, I was restricted to non-weight bearing activities for three weeks. If I wished to return to wrestling, the doctor stated that I would have to demonstrate a muscle strength in my injured knee equal to ninety percent of my good one. When informed of this requirement, I could barely bend my leg twenty degrees nor use it to lift a ten-pound weight. One week after surgery and with the aid of crutches, I nervously entered the rehabilitation clinic. The physical therapist gingerly measured my quadricep and noted that I had lost an inch of muscle. For the first time in my life when .....

.... around the sun, it is also rotating on it’s own axis. One full rotation equals one day or twenty- four hours. At the middle of the day, noon, the sun is as direct as it can be, and this is also the hottest time of the day. But, when Earth makes one half turn, it changes to night when all of the air cools off, because the sun is on the opposite side of the earth. Without night, Earth would become unbearably hot in the summer. The sun, after doing all of these things, still gives us energy in the form of heat, light, etc. Without heat, there would be very little if any rain, because the water could not evaporate. Wit .....

.... trash is the "in thing", yet it is hardly convenient. Lets face the facts, sealed toxins "won't affect us for a good twenty years". Although this may be true, there are still many advantages to waste management. Today, more people are in favour of companies who invest in "green products". As a result, companies have removed phosphates, bleaches, and have made their paper products out of recycled papers. At home, families, are saving things, like leftovers, and making sandwiches for the next day. Industries are also manufacturing most of their christmas cards out of recycled paper, since it takes 20 trees to make a ton of it. .....

.... is not flammable, but when exposed to air it turns to flammable fumes. The capsule was filled with pure oxygen in an effort to allow the astronauts to work more efficiently. It also turns normally not so flammable items to highly flammable items. Raschel netting that was highly flammable in the pure oxygen environment was near the exposed section of the wires. At 6:31:04 p.m. the Raschel netting burst into an open flame. A second after the netting burst into flames, the first message came over the crew's radio channel: "Fire," Grissom said. Two Seconds later, Chaffee said clearly, "We've got a fire in the cockpit." His tone .....

.... Africa had just split from marsupial overrun Gondwanaland. About a million years later it reached the Middle East, and primates moved in. By now the world had cooled enough that the primates in Europe had been decimated to near extinction. They also migrated south, for the Mediterranean Sea was at that time dry lowland. Now almost all of the primates left in the world were in Africa, and the only marsupial that wasn’t wiped out was the opossum. Primates and large cats now ruled, with rodents scarce, which meant that the primates had to adapt to keep from becoming lunch. In light of this, natural selection shows only t .....

.... that their true nature can only be explored with the advanced telescopes of the future." "This observation is a major step toward fulfilling one of Hubble's key objectives: to search for the faintest and farthest objects in the universe," adds Ed Weiler, NASA's acting Associate Administrator for Space Science. In a separate discovery, Thompson also found that faint red galaxies matched up with compact blue knots of light seen in the earlier visible light image. "This means that some objects that appeared to be separate galaxies in the optical image are really hot star-forming regions in much larger older galaxies," he says. .....

.... the Internet. Sometimes they do seemingly harmless acts, such as just going into a computer system and observing, but at other times, they steal, destroy or alter data. On some occasions, these cyber-felons perform even more malicious acts, such as infecting systems with "viruses," computer programs that "infect" the systems by latching onto other programs and eventually destroying them. Another favorite activity of the hacker is to gain access to the computer system and then manually either delete files or cause the computer to do "strange" things, such as placing messages on the screen that either make no sense or have an unusual .....

.... there is one acre less that we have for possible life saving medicines. About 70 percent of plants used in anti- cancer drug come are the rain forest. We are slowly destroying the environment and ourselves. Whether we realize it or not, the world could quickly come to an ecological stop. Every day 144,000 acres of the rainforests are cut down, slashed and/or put up in flames. In 1974, Brazil started a forest fire of 20.6 million square feet (3,900 square miles). The fire ragged out of control and was later marked the largest forest fire in Brazilian history. This 1974 fire is now considered small to others in the past r .....

.... number of these endangered species: Direct Causes Direct Causes is when the animals are purposely hunted, trapped, fished, whaled, or seled to extinction. Hunting for sport has been responsible for endangering such animals as the Polar Bear and the Siberian Tiger. But the endangerment of most species that are hunted or trapped today results mainly of commercial activities. Among the animals that have become endangered for commercial reasons are several species of whales, including the enormous Blue Whale; many of the spotted cats, such as the Cheetah; and some kinds of Alligators, Crocodiles, lizards, and snakes. the Whales have b .....