.... by doing this. For example, tomatoes are sensitive to frost. This shortens their growing season. Fish, on the other hand, survive in very cold water. Scientists identified a particular gene which enables a flounder to resist cold and used the technology of genetic engineering to insert this 'anti-freeze' gene into a tomato. This makes it possible to extend the growing season of the tomato. The marketing of genetic engineering inspires visions of perfect health, long life, and miracle foods. The reality is that these claims are often completely unsubstantiated and sometimes simply wrong. Claim .....

.... a gestation of up to 6 months, usually a single pinkish calf is born. Manatees ferquently communicate by muzzle to muzzle contact and when alarmed they emit chripy squeaks. The number of manatees has been reduced over the past several years due to heavy hunting for their hides, meat, and blubber oil. Some governments, including the United States, have placed the manatees under the endangered species list. One practical reason for this is that they have proved useful in clearin girrigation and transport channels clogged with aquatic plant life. There has also been an increase in man .....

.... is true. During a recent stay on the Falkland Islands, a Canadian researcher discovered that penguins are able to recognize individuals and navigate the rocky terrain on which they live quite well. Long of body and short of leg, they probably poke their heads forward as an aid to balance. And as for looking at the ground, they're merely-like us-keeping an eye on where they're going. The human eye is adapted for aerial vision, which is why scuba divers-or even you and I in the local swimming pool-must wear goggles or a face mask to re-introduce air in front of our eyes in order to see cl .....

.... Magnus about 1250, and he described the way to manufacture it. Since then the method has scarcely changed: the mineral arsenopyrite is heated and decomposes with the liberation of gas. The gas can be condensed on a cold surface. Metallic was first produced in the 17th century by heating with potash and soap. General Properties is very similar to antimony and bismuth. It exists in bright, metallic forms that are stable in air. It is found free in nature or in combination with other elements, usually sulfur. It is most often used to improve the strength and hardness of alloys, which are co .....

.... According to Accu-Weather, the world's leading commercial forecaster, "Global air temperatures as measured by land-based weather stations show an increase of about 0.45 degrees Celsius over the past century. This may be no more than normal climatic variation...and several biases in the data may be responsible for some of this increase." - Satellite data indicate a slight cooling in the climate in the last 18 years. These satellites use advanced technology and are not subject to the "heat island" effect around major cities that alters ground-based thermometers. - Projections of future .....

.... to high altitude balloons, by chemical-sondes or optical devices, which measured ozone concentrations through the depletion of UV light. However, the need to measure ozone concentrations from the surface at regular intervals, led to the development of the Dobson spectrophotometer in the 1960s. The British Antarctic Survey has the responsibility to routinely monitor stratospheric ozone levels over the Antarctic stations at Halley Bay (76°S 27°W) and at Argentine Islands (65°S 64°W). Analysis of ozone measurements in 1984 by a team led by John Farnam, made the startling disco .....

.... that holds a stationary phase in equilibrium with a solvent. Typical stationary phases (and their interactions with solutes) are: solids (adsorption), ionic groups on a resin (ion-exchange), liquids on an inert solid support (partitioning), and porous inert particles (size exclusion). The mixture to be separated is loaded onto the top of the column followed by more solvent. The different components in the sample mixture pass through the column at different rates due to differences in their partition behavior between the mobile phase and the stationary phase. The compounds are separated by col .....

.... all seems very straightforward: greenhouse gases trap the sun's heat, warming the planet sufficiently for life to exist. There is, however, one problem: human activity has dramatically increased the amount of greenhouse gases in the atmosphere. Over the last two centuries the concentration of greenhouse gases in the atmosphere has increased quite significantly, mainly as a result of burning fossil fuels for industrial purposes. For example, atmospheric concentrations of carbon dioxide have increased from 280-285 parts per million in 1800 to 350 parts per million today. Currently the concent .....

.... the skin open and resting at the water surface to allow its' body parts to harden. can complete the entire egg to adult cycle in 10 to 14 days, depending on the temperature, with shorter times during warmer periods. Some species can even reach the adult stage in as little as two to three days. Why Do We Need ? Mosquitoes are very abundant. Many of the eggs that mosquitoes lay in the water, and never become adults. They are eaten by fish, insects, frogs, toads and other amphibians. They are a major food source for some of these creatures. Once mosquitoes become adults, they become th .....

.... conversion to methane than any other plant. This renewable fuel contains no sulfur and while growing helps remove carbon dioxide from the atmosphere via photosynthesis. For thousands of years, all good paints and varnishes were made from an oil from the plant. Today, it has almost been totally replaced by chemically derived oils. In closing, it is estimated that if just 6 percent of all our farmable land were seeded with this plant, it could supply us with all our fuel, gas and oil needs. I find it funny that government officials don't realize the impact that this single plant could have on .....